diff --git a/libtorrent/include/libtorrent/bandwidth_manager.hpp b/libtorrent/include/libtorrent/bandwidth_manager.hpp
index 68cb7c73a..89efcb9e8 100644
--- a/libtorrent/include/libtorrent/bandwidth_manager.hpp
+++ b/libtorrent/include/libtorrent/bandwidth_manager.hpp
@@ -124,6 +124,12 @@ struct bandwidth_manager
 	bool is_in_history(PeerConnection const* peer) const
 	{
 		mutex_t::scoped_lock l(m_mutex);
+		return is_in_history(peer, l);
+	}
+
+	bool is_in_history(PeerConnection const* peer, boost::mutex::scoped_lock& l) const
+	{
+		TORRENT_ASSERT(l.locked());
 		for (typename history_t::const_iterator i
 			= m_history.begin(), end(m_history.end()); i != end; ++i)
 		{
@@ -133,17 +139,21 @@ struct bandwidth_manager
 	}
 #endif
 
+ 	int queue_size() const
+ 	{
+ 		mutex_t::scoped_lock l(m_mutex);
+ 		return m_queue.size();
+ 	}
+
 	// non prioritized means that, if there's a line for bandwidth,
 	// others will cut in front of the non-prioritized peers.
 	// this is used by web seeds
 	void request_bandwidth(intrusive_ptr<PeerConnection> peer
-		, int blk
-		, bool non_prioritized) throw()
+ 		, int blk, int priority)
 	{
+		mutex_t::scoped_lock l(m_mutex);
 		INVARIANT_CHECK;
 		TORRENT_ASSERT(blk > 0);
-
-		mutex_t::scoped_lock l(m_mutex);
 		TORRENT_ASSERT(!peer->ignore_bandwidth_limits());
 
 		// make sure this peer isn't already in line
@@ -157,38 +167,13 @@ struct bandwidth_manager
 #endif
  		TORRENT_ASSERT(peer->max_assignable_bandwidth(m_channel) > 0);
 
-		boost::shared_ptr<Torrent> t = peer->associated_torrent().lock();
-
-		if (peer->max_assignable_bandwidth(m_channel) == 0)
-		{
-			t->expire_bandwidth(m_channel, blk);
-			peer->assign_bandwidth(m_channel, 0);
-			return;
-		}
-		m_queue.push_back(bw_queue_entry<PeerConnection>(peer, blk, non_prioritized));
-		if (!non_prioritized)
-		{
-			typename queue_t::reverse_iterator i = m_queue.rbegin();
-			typename queue_t::reverse_iterator j(i);
-			for (++j; j != m_queue.rend(); ++j)
-			{
-				// if the peer's torrent is not the same one
-				// continue looking for a peer from the same torrent
-				if (j->peer->associated_torrent().lock() != t)
-					continue;
-				// if we found a peer from the same torrent that
-				// is prioritized, there is no point looking
-				// any further.
-				if (!j->non_prioritized) break;
-
-				using std::swap;
-				swap(*i, *j);
-				i = j;
-			}
-		}
-#ifdef TORRENT_VERBOSE_BANDWIDTH_LIMIT
-		std::cerr << " req_bandwidht. m_queue.size() = " << m_queue.size() << std::endl;
-#endif
+ 		typename queue_t::reverse_iterator i(m_queue.rbegin());
+ 		while (i != m_queue.rend() && priority > i->priority)
+ 		{
+ 			++i->priority;
+ 			++i;
+ 		}
+ 		m_queue.insert(i.base(), bw_queue_entry<PeerConnection>(peer, blk, priority));
 		if (!m_queue.empty()) hand_out_bandwidth(l);
 	}
 
@@ -201,18 +186,24 @@ struct bandwidth_manager
 		{
 			current_quota += i->amount;
 		}
-
 		TORRENT_ASSERT(current_quota == m_current_quota);
+
+		typename queue_t::const_iterator j = m_queue.begin();
+		if (j != m_queue.end())
+		{
+			++j;
+			for (typename queue_t::const_iterator i = m_queue.begin()
+				, end(m_queue.end()); i != end && j != end; ++i, ++j)
+				TORRENT_ASSERT(i->priority >= j->priority);
+		}
 	}
 #endif
 
 private:
 
-	void add_history_entry(history_entry<PeerConnection, Torrent> const& e) throw()
+	void add_history_entry(history_entry<PeerConnection, Torrent> const& e)
 	{
-#ifndef NDEBUG
 		try {
-#endif
 		INVARIANT_CHECK;
 		m_history.push_front(e);
 		m_current_quota += e.amount;
@@ -224,24 +215,19 @@ private:
 
 		m_history_timer.expires_at(e.expires_at);
 		m_history_timer.async_wait(bind(&bandwidth_manager::on_history_expire, this, _1));
-#ifndef NDEBUG
 		}
-		catch (std::exception&) { TORRENT_ASSERT(false); }
-#endif
+		catch (std::exception&) {}
 	}
 	
-	void on_history_expire(asio::error_code const& e) throw()
+	void on_history_expire(asio::error_code const& e)
 	{
-#ifndef NDEBUG
 		try {
-#endif
-		INVARIANT_CHECK;
-
 		if (e) return;
 
+		mutex_t::scoped_lock l(m_mutex);
+		INVARIANT_CHECK;
 		TORRENT_ASSERT(!m_history.empty());
 
-		mutex_t::scoped_lock l(m_mutex);
 		ptime now(time_now());
 		while (!m_history.empty() && m_history.back().expires_at <= now)
 		{
@@ -268,24 +254,19 @@ private:
 		// means we can hand out more (in case there
 		// are still consumers in line)
 		if (!m_queue.empty()) hand_out_bandwidth(l);
-#ifndef NDEBUG
 		}
-		catch (std::exception&)
-		{
-			TORRENT_ASSERT(false);
-		}
-#endif
+		catch (std::exception&) {}
 	}
 
 	void hand_out_bandwidth(boost::mutex::scoped_lock& l) throw()
 	{
+		TORRENT_ASSERT(l.locked());
 		// if we're already handing out bandwidth, just return back
 		// to the loop further down on the callstack
 		if (m_in_hand_out_bandwidth) return;
 		m_in_hand_out_bandwidth = true;
-#ifndef NDEBUG
+
 		try {
-#endif
 		INVARIANT_CHECK;
 
 		ptime now(time_now());
@@ -308,24 +289,20 @@ private:
 			return;
 		}
 
-		queue_t q;
 		queue_t tmp;
-		m_queue.swap(q);
-		while (!q.empty() && amount > 0)
+		while (!m_queue.empty() && amount > 0)
 		{
-			TORRENT_ASSERT(amount == limit - m_current_quota);
-			bw_queue_entry<PeerConnection> qe = q.front();
+			bw_queue_entry<PeerConnection> qe = m_queue.front();
 			TORRENT_ASSERT(qe.max_block_size > 0);
-			q.pop_front();
+			m_queue.pop_front();
 
-			shared_ptr<Torrent> t = qe.peer->associated_torrent().lock();
+			shared_ptr<Torrent> t = qe.torrent.lock();
 			if (!t) continue;
 			if (qe.peer->is_disconnecting())
 			{
 				l.unlock();
 				t->expire_bandwidth(m_channel, qe.max_block_size);
 				l.lock();
-				amount = limit - m_current_quota;
 				continue;
 			}
 
@@ -335,7 +312,7 @@ private:
 			int max_assignable = qe.peer->max_assignable_bandwidth(m_channel);
 			if (max_assignable == 0)
 			{
-				TORRENT_ASSERT(is_in_history(qe.peer.get()));
+				TORRENT_ASSERT(is_in_history(qe.peer.get(), l));
 				tmp.push_back(qe);
 				continue;
 			}
@@ -379,11 +356,6 @@ private:
 #ifdef TORRENT_VERBOSE_BANDWIDTH_LIMIT
 			std::cerr << " block_size = " << block_size << " amount = " << amount << std::endl;
 #endif
-			if (amount < block_size / 2)
-			{
-				tmp.push_back(qe);
-				break;
-			}
 
 			// so, hand out max_assignable, but no more than
 			// the available bandwidth (amount) and no more
@@ -391,7 +363,6 @@ private:
 			int hand_out_amount = (std::min)((std::min)(block_size, max_assignable)
 				, amount);
 			TORRENT_ASSERT(hand_out_amount > 0);
-			TORRENT_ASSERT(amount == limit - m_current_quota);
 			amount -= hand_out_amount;
 			TORRENT_ASSERT(hand_out_amount <= qe.max_block_size);
 			l.unlock();
@@ -400,15 +371,14 @@ private:
 			l.lock();
 			add_history_entry(history_entry<PeerConnection, Torrent>(
 				qe.peer, t, hand_out_amount, now + bw_window_size));
-			amount = limit - m_current_quota;
 		}
- 		if (!q.empty()) m_queue.insert(m_queue.begin(), q.begin(), q.end());
  		if (!tmp.empty()) m_queue.insert(m_queue.begin(), tmp.begin(), tmp.end());
-#ifndef NDEBUG
 		}
 		catch (std::exception& e)
-		{ TORRENT_ASSERT(false); };
-#endif
+		{
+			m_in_hand_out_bandwidth = false;
+			throw;
+		}
 		m_in_hand_out_bandwidth = false;
 	}
 
diff --git a/libtorrent/include/libtorrent/bandwidth_queue_entry.hpp b/libtorrent/include/libtorrent/bandwidth_queue_entry.hpp
index 76c119d96..f8b44846c 100644
--- a/libtorrent/include/libtorrent/bandwidth_queue_entry.hpp
+++ b/libtorrent/include/libtorrent/bandwidth_queue_entry.hpp
@@ -40,12 +40,15 @@ namespace libtorrent {
 template<class PeerConnection>
 struct bw_queue_entry
 {
+	typedef typename PeerConnection::torrent_type torrent_type;
 	bw_queue_entry(boost::intrusive_ptr<PeerConnection> const& pe
-		, int blk, bool no_prio)
-		: peer(pe), max_block_size(blk), non_prioritized(no_prio) {}
+		, int blk, int prio)
+		: peer(pe), torrent(peer->associated_torrent())
+		, max_block_size(blk), priority(prio) {}
 	boost::intrusive_ptr<PeerConnection> peer;
+	boost::weak_ptr<torrent_type> torrent;
 	int max_block_size;
-	bool non_prioritized;
+	int priority; // 0 is low prio
 };
 
 }
diff --git a/libtorrent/include/libtorrent/http_connection.hpp b/libtorrent/include/libtorrent/http_connection.hpp
index 9d32af2e9..b65b303ae 100644
--- a/libtorrent/include/libtorrent/http_connection.hpp
+++ b/libtorrent/include/libtorrent/http_connection.hpp
@@ -78,7 +78,7 @@ struct http_connection : boost::enable_shared_from_this<http_connection>, boost:
 		, m_download_quota(0)
 		, m_limiter_timer_active(false)
 		, m_limiter_timer(ios)
-		, m_redirect(true)
+		, m_redirects(5)
 		, m_connection_ticket(-1)
 		, m_cc(cc)
 	{
@@ -93,10 +93,10 @@ struct http_connection : boost::enable_shared_from_this<http_connection>, boost:
 	std::string sendbuffer;
 
 	void get(std::string const& url, time_duration timeout = seconds(30)
-		, bool handle_redirect = true);
+		, int handle_redirects = 5);
 
 	void start(std::string const& hostname, std::string const& port
-		, time_duration timeout, bool handle_redirect = true);
+		, time_duration timeout, int handle_redirect = 5);
 	void close();
 
 	tcp::socket const& socket() const { return m_sock; }
@@ -153,9 +153,8 @@ private:
 	// as all the quota was used.
 	deadline_timer m_limiter_timer;
 
-	// if set to true, the connection should handle
-	// HTTP redirects.
-	bool m_redirect;
+	// the number of redirects to follow (in sequence)
+	int m_redirects;
 
 	int m_connection_ticket;
 	connection_queue& m_cc;
diff --git a/libtorrent/include/libtorrent/invariant_check.hpp b/libtorrent/include/libtorrent/invariant_check.hpp
index 3075b8975..c687b6a63 100755
--- a/libtorrent/include/libtorrent/invariant_check.hpp
+++ b/libtorrent/include/libtorrent/invariant_check.hpp
@@ -66,7 +66,7 @@ namespace libtorrent
 	}
 }
 
-#ifndef NDEBUG
+#if !defined NDEBUG && !defined TORRENT_DISABLE_INVARIANT_CHECKS
 #define INVARIANT_CHECK \
 	invariant_checker const& _invariant_check = make_invariant_checker(*this); \
 	(void)_invariant_check; \
diff --git a/libtorrent/include/libtorrent/peer_connection.hpp b/libtorrent/include/libtorrent/peer_connection.hpp
index 60cb4bc17..13fab90ca 100755
--- a/libtorrent/include/libtorrent/peer_connection.hpp
+++ b/libtorrent/include/libtorrent/peer_connection.hpp
@@ -98,6 +98,8 @@ namespace libtorrent
 	friend class invariant_access;
 	public:
 
+		typedef torrent torrent_type;
+	
 		enum channels
 		{
 			upload_channel,
@@ -173,8 +175,8 @@ namespace libtorrent
 		void request_large_blocks(bool b)
 		{ m_request_large_blocks = b; }
 
-		void set_non_prioritized(bool b)
-		{ m_non_prioritized = b; }
+		void set_priority(int p)
+		{ m_priority = p; }
 
 		void fast_reconnect(bool r);
 		bool fast_reconnect() const { return m_fast_reconnect; }
@@ -224,7 +226,7 @@ namespace libtorrent
 		void add_stat(size_type downloaded, size_type uploaded);
 
 		// is called once every second by the main loop
-		void second_tick(float tick_interval) throw();
+		void second_tick(float tick_interval);
 
 		boost::shared_ptr<socket_type> get_socket() const { return m_socket; }
 		tcp::endpoint const& remote() const { return m_remote; }
@@ -683,11 +685,9 @@ namespace libtorrent
 		// at a time.
 		bool m_request_large_blocks;
 		
-		// if this is true, other (prioritized) peers will
-		// skip ahead of it in the queue for bandwidth. The
-		// effect is that non prioritized peers will only use
-		// the left-over bandwidth (suitable for web seeds).
-		bool m_non_prioritized;
+		// this is the priority with which this peer gets
+		// download bandwidth quota assigned to it.
+		int m_priority;
 
 		int m_upload_limit;
 		int m_download_limit;
diff --git a/libtorrent/include/libtorrent/peer_info.hpp b/libtorrent/include/libtorrent/peer_info.hpp
index b07acffd4..e65f33a18 100755
--- a/libtorrent/include/libtorrent/peer_info.hpp
+++ b/libtorrent/include/libtorrent/peer_info.hpp
@@ -96,8 +96,10 @@ namespace libtorrent
 		// time since last download or upload
 		time_duration last_active;
 
-		// the size of the send buffer for this peer
+		// the size of the send buffer for this peer, in bytes
 		int send_buffer_size;
+		// the number bytes that's actually used of the send buffer
+		int used_send_buffer;
 
 		// the number of failed hashes for this peer
 		int num_hashfails;
diff --git a/libtorrent/include/libtorrent/session_status.hpp b/libtorrent/include/libtorrent/session_status.hpp
index adbb1b57d..e0a9b88a7 100644
--- a/libtorrent/include/libtorrent/session_status.hpp
+++ b/libtorrent/include/libtorrent/session_status.hpp
@@ -55,6 +55,9 @@ namespace libtorrent
 
 		int num_peers;
 
+		int up_bandwidth_queue;
+		int down_bandwidth_queue;
+
 #ifndef TORRENT_DISABLE_DHT
 		int dht_nodes;
 		int dht_node_cache;
diff --git a/libtorrent/include/libtorrent/torrent.hpp b/libtorrent/include/libtorrent/torrent.hpp
index f66620999..773188cce 100755
--- a/libtorrent/include/libtorrent/torrent.hpp
+++ b/libtorrent/include/libtorrent/torrent.hpp
@@ -229,13 +229,12 @@ namespace libtorrent
 
 		void request_bandwidth(int channel
 			, boost::intrusive_ptr<peer_connection> const& p
-			, bool non_prioritized);
+			, int priority);
 
 		void perform_bandwidth_request(int channel
 			, boost::intrusive_ptr<peer_connection> const& p
-			, int block_size
-			, bool non_prioritized);
-		
+			, int block_size, int priority);
+
 		void expire_bandwidth(int channel, int amount);
 		void assign_bandwidth(int channel, int amount, int blk);
 		
diff --git a/libtorrent/include/libtorrent/torrent_handle.hpp b/libtorrent/include/libtorrent/torrent_handle.hpp
index 48a17e2ec..14217d9a4 100755
--- a/libtorrent/include/libtorrent/torrent_handle.hpp
+++ b/libtorrent/include/libtorrent/torrent_handle.hpp
@@ -112,6 +112,8 @@ namespace libtorrent
 			, uploads_limit(0)
 			, connections_limit(0)
 			, storage_mode(storage_mode_sparse)
+			, up_bandwidth_queue(0)
+			, down_bandwidth_queue(0)
 		{}
 
 		enum state_t
@@ -231,6 +233,9 @@ namespace libtorrent
 		// true if the torrent is saved in compact mode
 		// false if it is saved in full allocation mode
 		storage_mode_t storage_mode;
+
+		int up_bandwidth_queue;
+		int down_bandwidth_queue;
 	};
 
 	struct TORRENT_EXPORT block_info
diff --git a/libtorrent/src/disk_io_thread.cpp b/libtorrent/src/disk_io_thread.cpp
index 886d5d891..e1cfbfe5f 100644
--- a/libtorrent/src/disk_io_thread.cpp
+++ b/libtorrent/src/disk_io_thread.cpp
@@ -333,7 +333,11 @@ namespace libtorrent
 			catch (std::exception& e)
 			{
 //				std::cerr << "DISK THREAD: exception: " << e.what() << std::endl;
-				j.str = e.what();
+				try
+				{
+					j.str = e.what();
+				}
+				catch (std::exception&) {}
 				ret = -1;
 			}
 
diff --git a/libtorrent/src/http_connection.cpp b/libtorrent/src/http_connection.cpp
index a73d0a9af..359bd52f6 100644
--- a/libtorrent/src/http_connection.cpp
+++ b/libtorrent/src/http_connection.cpp
@@ -45,9 +45,8 @@ namespace libtorrent
 	enum { max_bottled_buffer = 1024 * 1024 };
 
 void http_connection::get(std::string const& url, time_duration timeout
-	, bool handle_redirect)
+	, int handle_redirects)
 {
-	m_redirect = handle_redirect;
 	std::string protocol;
 	std::string auth;
 	std::string hostname;
@@ -62,21 +61,23 @@ void http_connection::get(std::string const& url, time_duration timeout
 		headers << "Authorization: Basic " << base64encode(auth) << "\r\n";
 	headers << "\r\n";
 	sendbuffer = headers.str();
-	start(hostname, boost::lexical_cast<std::string>(port), timeout);
+ 	start(hostname, boost::lexical_cast<std::string>(port), timeout, handle_redirects);
 }
 
 void http_connection::start(std::string const& hostname, std::string const& port
-	, time_duration timeout, bool handle_redirect)
+ 	, time_duration timeout, int handle_redirects)
 {
-	m_redirect = handle_redirect;
+ 	m_redirects = handle_redirects;
 	m_timeout = timeout;
 	m_timer.expires_from_now(m_timeout);
 	m_timer.async_wait(bind(&http_connection::on_timeout
 		, boost::weak_ptr<http_connection>(shared_from_this()), _1));
 	m_called = false;
+ 	m_parser.reset();
+ 	m_recvbuffer.clear();
+ 	m_read_pos = 0;
 	if (m_sock.is_open() && m_hostname == hostname && m_port == port)
 	{
-		m_parser.reset();
 		asio::async_write(m_sock, asio::buffer(sendbuffer)
 			, bind(&http_connection::on_write, shared_from_this(), _1));
 	}
@@ -233,6 +234,7 @@ void http_connection::on_read(asio::error_code const& e
 
 	if (e == asio::error::eof)
 	{
+		TORRENT_ASSERT(bytes_transferred == 0);
 		char const* data = 0;
 		std::size_t size = 0;
 		if (m_bottled && m_parser.header_finished())
@@ -247,6 +249,7 @@ void http_connection::on_read(asio::error_code const& e
 
 	if (e)
 	{
+		TORRENT_ASSERT(bytes_transferred == 0);
 		callback(e);
 		close();
 		return;
@@ -255,31 +258,6 @@ void http_connection::on_read(asio::error_code const& e
 	m_read_pos += bytes_transferred;
 	TORRENT_ASSERT(m_read_pos <= int(m_recvbuffer.size()));
 
-	// having a nonempty path means we should handle redirects
-	if (m_redirect && m_parser.header_finished())
-	{
-		int code = m_parser.status_code();
-		if (code >= 300 && code < 400)
-		{
-			// attempt a redirect
-			std::string const& url = m_parser.header("location");
-			if (url.empty())
-			{
-				// missing location header
-				callback(e);
-				return;
-			}
-
-			m_limiter_timer_active = false;
-			close();
-
-			get(url, m_timeout);
-			return;
-		}
-	
-		m_redirect = false;
-	}
-
 	if (m_bottled || !m_parser.header_finished())
 	{
 		libtorrent::buffer::const_interval rcv_buf(&m_recvbuffer[0]
@@ -295,6 +273,32 @@ void http_connection::on_read(asio::error_code const& e
 			m_handler.clear();
 			return;
 		}
+
+		// having a nonempty path means we should handle redirects
+		if (m_redirects && m_parser.header_finished())
+		{
+			int code = m_parser.status_code();
+
+			if (code >= 300 && code < 400)
+			{
+				// attempt a redirect
+				std::string const& url = m_parser.header("location");
+				if (url.empty())
+				{
+					// missing location header
+					callback(e);
+					return;
+				}
+
+				asio::error_code ec;
+				m_sock.close(ec);
+				get(url, m_timeout, m_redirects - 1);
+				return;
+			}
+	
+			m_redirects = 0;
+		}
+
 		if (!m_bottled && m_parser.header_finished())
 		{
 			if (m_read_pos > m_parser.body_start())
diff --git a/libtorrent/src/pe_crypto.cpp b/libtorrent/src/pe_crypto.cpp
index 093bb1265..a865b4c73 100644
--- a/libtorrent/src/pe_crypto.cpp
+++ b/libtorrent/src/pe_crypto.cpp
@@ -1,6 +1,6 @@
 /*
 
-Copyright (c) 2007, Un Shyam
+Copyright (c) 2007, Un Shyam & Arvid Norberg
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -40,23 +40,33 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/pe_crypto.hpp"
 #include "libtorrent/assert.hpp"
 
-namespace libtorrent {
+namespace libtorrent
+{
 
-	
 	// Set the prime P and the generator, generate local public key
-	DH_key_exchange::DH_key_exchange ()
+	DH_key_exchange::DH_key_exchange()
 	{
-		m_DH = DH_new ();
+		m_DH = DH_new();
+		if (m_DH == 0) throw std::bad_alloc();
+
+		m_DH->p = BN_bin2bn(m_dh_prime, sizeof(m_dh_prime), NULL);
+		m_DH->g = BN_bin2bn(m_dh_generator, sizeof(m_dh_generator), NULL);
+		if (m_DH->p == 0 || m_DH->g == 0)
+		{
+			DH_free(m_DH);
+			throw std::bad_alloc();
+		}
 
-		m_DH->p = BN_bin2bn (m_dh_prime, sizeof(m_dh_prime), NULL);
-		m_DH->g = BN_bin2bn (m_dh_generator, sizeof(m_dh_generator), NULL);
 		m_DH->length = 160l;
 
 		TORRENT_ASSERT(sizeof(m_dh_prime) == DH_size(m_DH));
 		
-		DH_generate_key (m_DH); // TODO Check != 0
-
-		TORRENT_ASSERT(m_DH->pub_key);
+		DH_generate_key(m_DH);
+		if (m_DH->pub_key == 0)
+		{
+			DH_free(m_DH);
+			throw std::bad_alloc();
+		}
 
 		// DH can generate key sizes that are smaller than the size of
 		// P with exponentially decreasing probability, in which case
@@ -76,27 +86,29 @@ namespace libtorrent {
 			BN_bn2bin(m_DH->pub_key, (unsigned char*)m_dh_local_key); // TODO Check return value
 	}
 
-	DH_key_exchange::~DH_key_exchange ()
+	DH_key_exchange::~DH_key_exchange()
 	{
 		TORRENT_ASSERT(m_DH);
-		DH_free (m_DH);
+		DH_free(m_DH);
 	}
 
-	char const* DH_key_exchange::get_local_key () const
+	char const* DH_key_exchange::get_local_key() const
 	{
 		return m_dh_local_key;
 	}	
 
 
 	// compute shared secret given remote public key
-	void DH_key_exchange::compute_secret (char const* remote_pubkey)
+	void DH_key_exchange::compute_secret(char const* remote_pubkey)
 	{
 		TORRENT_ASSERT(remote_pubkey);
 		BIGNUM* bn_remote_pubkey = BN_bin2bn ((unsigned char*)remote_pubkey, 96, NULL);
+		if (bn_remote_pubkey == 0) throw std::bad_alloc();
 		char dh_secret[96];
 
-		int secret_size = DH_compute_key ( (unsigned char*)dh_secret, 
-						   bn_remote_pubkey, m_DH); // TODO Check for errors
+		int secret_size = DH_compute_key((unsigned char*)dh_secret
+			, bn_remote_pubkey, m_DH);
+		if (secret_size < 0 || secret_size > 96) throw std::bad_alloc();
 
 		if (secret_size != 96)
 		{
@@ -104,11 +116,10 @@ namespace libtorrent {
 			std::fill(m_dh_secret, m_dh_secret + 96 - secret_size, 0);
 		}
 		std::copy(dh_secret, dh_secret + secret_size, m_dh_secret + 96 - secret_size);
-
-		BN_free (bn_remote_pubkey);
+		BN_free(bn_remote_pubkey);
 	}
 
-	char const* DH_key_exchange::get_secret () const
+	char const* DH_key_exchange::get_secret() const
 	{
 		return m_dh_secret;
 	}
@@ -129,3 +140,4 @@ namespace libtorrent {
 } // namespace libtorrent
 
 #endif // #ifndef TORRENT_DISABLE_ENCRYPTION
+
diff --git a/libtorrent/src/peer_connection.cpp b/libtorrent/src/peer_connection.cpp
index ac61f042f..0e120e3c8 100755
--- a/libtorrent/src/peer_connection.cpp
+++ b/libtorrent/src/peer_connection.cpp
@@ -109,7 +109,7 @@ namespace libtorrent
 		, m_reading(false)
 		, m_prefer_whole_pieces(false)
 		, m_request_large_blocks(false)
-		, m_non_prioritized(false)
+		, m_priority(1)
 		, m_upload_limit(bandwidth_limit::inf)
 		, m_download_limit(bandwidth_limit::inf)
 		, m_peer_info(peerinfo)
@@ -186,7 +186,7 @@ namespace libtorrent
 		, m_reading(false)
 		, m_prefer_whole_pieces(false)
 		, m_request_large_blocks(false)
-		, m_non_prioritized(false)
+		, m_priority(1)
 		, m_upload_limit(bandwidth_limit::inf)
 		, m_download_limit(bandwidth_limit::inf)
 		, m_peer_info(peerinfo)
@@ -376,6 +376,7 @@ namespace libtorrent
 	peer_connection::~peer_connection()
 	{
 //		INVARIANT_CHECK;
+		TORRENT_ASSERT(!m_in_constructor);
 		TORRENT_ASSERT(m_disconnecting);
 
 #ifdef TORRENT_VERBOSE_LOGGING
@@ -593,6 +594,7 @@ namespace libtorrent
 		// check to make sure we don't have another connection with the same
 		// info_hash and peer_id. If we do. close this connection.
 		t->attach_peer(this);
+		if (m_disconnecting) return;
 		m_torrent = wpt;
 
 		TORRENT_ASSERT(!m_torrent.expired());
@@ -1740,7 +1742,8 @@ namespace libtorrent
 		INVARIANT_CHECK;
 
 		boost::shared_ptr<torrent> t = m_torrent.lock();
-		TORRENT_ASSERT(t);
+		// this peer might be disconnecting
+		if (!t) return;
 
 		TORRENT_ASSERT(t->valid_metadata());
 
@@ -1991,16 +1994,17 @@ namespace libtorrent
 	{
 		session_impl::mutex_t::scoped_lock l(m_ses.m_mutex);
 
+		TORRENT_ASSERT(!m_in_constructor);
 		boost::intrusive_ptr<peer_connection> me(this);
 
 		INVARIANT_CHECK;
 
 		if (m_disconnecting) return;
-		m_disconnecting = true;
-		if (m_connecting)
+		if (m_connecting && m_connection_ticket >= 0)
+		{
 			m_ses.m_half_open.done(m_connection_ticket);
-
-		m_ses.m_io_service.post(boost::bind(&close_socket_ignore_error, m_socket));
+			m_connection_ticket = -1;
+		}
 
 		boost::shared_ptr<torrent> t = m_torrent.lock();
 
@@ -2026,7 +2030,9 @@ namespace libtorrent
 			m_torrent.reset();
 		}
 
+		m_disconnecting = true;
 		m_ses.close_connection(me);
+ 		m_ses.m_io_service.post(boost::bind(&close_socket_ignore_error, m_socket));
 	}
 
 	void peer_connection::set_upload_limit(int limit)
@@ -2071,7 +2077,8 @@ namespace libtorrent
 
 	bool peer_connection::on_local_network() const
 	{
-		if (libtorrent::is_local(m_remote.address())) return true;
+		if (libtorrent::is_local(m_remote.address())
+			|| is_loopback(m_remote.address())) return true;
 		return false;
 	}
 
@@ -2154,6 +2161,7 @@ namespace libtorrent
 		}
 
 		p.send_buffer_size = m_send_buffer.capacity();
+		p.used_send_buffer = m_send_buffer.size();
 	}
 
 	void peer_connection::cut_receive_buffer(int size, int packet_size)
@@ -2178,7 +2186,7 @@ namespace libtorrent
 		if (m_packet_size >= m_recv_pos) m_recv_buffer.resize(m_packet_size);
 	}
 
-	void peer_connection::second_tick(float tick_interval) throw()
+	void peer_connection::second_tick(float tick_interval)
 	{
 		INVARIANT_CHECK;
 
@@ -2355,8 +2363,7 @@ namespace libtorrent
 		else if (buffer_size_watermark > 80 * 1024) buffer_size_watermark = 80 * 1024;
 
 		while (!m_requests.empty()
-			&& (send_buffer_size() + m_reading_bytes < buffer_size_watermark)
-			&& !m_choked)
+			&& (send_buffer_size() + m_reading_bytes < buffer_size_watermark))
 		{
 			TORRENT_ASSERT(t->valid_metadata());
 			peer_request& r = m_requests.front();
@@ -2482,7 +2489,7 @@ namespace libtorrent
 				// peers that we are not interested in are non-prioritized
 				m_writing = true;
 				t->request_bandwidth(upload_channel, self()
-					, !(is_interesting() && !has_peer_choked()));
+					, is_interesting() * 2);
 			}
 			return;
 		}
@@ -2535,7 +2542,7 @@ namespace libtorrent
 				(*m_logger) << "req bandwidth [ " << download_channel << " ]\n";
 #endif
 				m_reading = true;
-				t->request_bandwidth(download_channel, self(), m_non_prioritized);
+				t->request_bandwidth(download_channel, self(), m_priority);
 			}
 			return;
 		}
@@ -3161,7 +3168,6 @@ namespace libtorrent
 
 	bool peer_connection::is_seed() const
 	{
-		INVARIANT_CHECK;
 		// if m_num_pieces == 0, we probably don't have the
 		// metadata yet.
 		return m_num_pieces == (int)m_have_piece.size() && m_num_pieces > 0;
diff --git a/libtorrent/src/session_impl.cpp b/libtorrent/src/session_impl.cpp
index 055bf38db..209e833c3 100755
--- a/libtorrent/src/session_impl.cpp
+++ b/libtorrent/src/session_impl.cpp
@@ -1068,7 +1068,7 @@ namespace detail
 		}
 
 		// don't allow more connections than the max setting
-		if (num_connections() > max_connections())
+		if (num_connections() >= max_connections())
 		{
 #if defined(TORRENT_VERBOSE_LOGGING) || defined(TORRENT_LOGGING)
 			(*m_logger) << "number of connections limit exceeded (conns: "
@@ -2015,6 +2015,10 @@ namespace detail
 //		INVARIANT_CHECK;
 
 		session_status s;
+
+		s.up_bandwidth_queue = m_upload_channel.queue_size();
+		s.down_bandwidth_queue = m_download_channel.queue_size();
+
 		s.has_incoming_connections = m_incoming_connection;
 		s.num_peers = (int)m_connections.size();
 
@@ -2437,6 +2441,7 @@ namespace detail
 			boost::shared_ptr<torrent> t = (*i)->associated_torrent().lock();
 
 			peer_connection* p = i->get();
+			TORRENT_ASSERT(!p->is_disconnecting());
 			if (!p->is_choked()) ++unchokes;
 			if (p->peer_info_struct()
 				&& p->peer_info_struct()->optimistically_unchoked)
diff --git a/libtorrent/src/storage.cpp b/libtorrent/src/storage.cpp
index 07878e7ee..2f3c7e7f9 100755
--- a/libtorrent/src/storage.cpp
+++ b/libtorrent/src/storage.cpp
@@ -452,15 +452,19 @@ namespace libtorrent
 			// the directory exists.
 			if (file_iter->size == 0)
 			{
-				file(m_save_path / file_iter->path, file::out);
+				try {
+					file(m_save_path / file_iter->path, file::out);
+				} catch (std::exception&) {}
 				continue;
 			}
 
-			if (allocate_files)
-			{
-				m_files.open_file(this, m_save_path / file_iter->path, file::in | file::out)
-					->set_size(file_iter->size);
-			}
+			try {
+				if (allocate_files)
+				{
+					m_files.open_file(this, m_save_path / file_iter->path, file::in | file::out)
+						->set_size(file_iter->size);
+				}
+			} catch (std::exception&) {}
 		}
 		// close files that were opened in write mode
 		m_files.release(this);
diff --git a/libtorrent/src/torrent.cpp b/libtorrent/src/torrent.cpp
index 12db1e59b..e04e0be71 100755
--- a/libtorrent/src/torrent.cpp
+++ b/libtorrent/src/torrent.cpp
@@ -2164,13 +2164,8 @@ namespace libtorrent
 			throw protocol_error("reached connection limit");
 		}
 
-		TORRENT_ASSERT(m_connections.find(p) == m_connections.end());
-		peer_iterator ci = m_connections.insert(p).first;
 		try
 		{
-			// if new_connection throws, we have to remove the
-			// it from the list.
-
 #ifndef TORRENT_DISABLE_EXTENSIONS
 			for (extension_list_t::iterator i = m_extensions.begin()
 				, end(m_extensions.end()); i != end; ++i)
@@ -2179,15 +2174,14 @@ namespace libtorrent
 				if (pp) p->add_extension(pp);
 			}
 #endif
-			TORRENT_ASSERT(m_connections.find(p) == ci);
-			TORRENT_ASSERT(*ci == p);
-			m_policy.new_connection(**ci);
+			m_policy.new_connection(*p);
 		}
 		catch (std::exception& e)
 		{
-			m_connections.erase(ci);
 			throw;
 		}
+		TORRENT_ASSERT(m_connections.find(p) == m_connections.end());
+		peer_iterator ci = m_connections.insert(p).first;
 		TORRENT_ASSERT(p->remote() == p->get_socket()->remote_endpoint());
 
 #ifndef NDEBUG
@@ -2222,7 +2216,11 @@ namespace libtorrent
 #ifndef NDEBUG
 			std::size_t size = m_connections.size();
 #endif
-			p->disconnect();
+
+			if (p->is_disconnecting())
+				m_connections.erase(m_connections.begin());
+			else
+				p->disconnect();
 			TORRENT_ASSERT(m_connections.size() <= size);
 		}
 	}
@@ -2234,7 +2232,7 @@ namespace libtorrent
 
 	void torrent::request_bandwidth(int channel
 		, boost::intrusive_ptr<peer_connection> const& p
-		, bool non_prioritized)
+		, int priority)
 	{
 		TORRENT_ASSERT(m_bandwidth_limit[channel].throttle() > 0);
 		TORRENT_ASSERT(p->max_assignable_bandwidth(channel) > 0);
@@ -2243,16 +2241,20 @@ namespace libtorrent
 
 		if (m_bandwidth_limit[channel].max_assignable() > 0)
 		{
-			perform_bandwidth_request(channel, p, block_size, non_prioritized);
+			perform_bandwidth_request(channel, p, block_size, priority);
 		}
 		else
 		{
 			// skip forward in the queue until we find a prioritized peer
 			// or hit the front of it.
 			queue_t::reverse_iterator i = m_bandwidth_queue[channel].rbegin();
-			while (i != m_bandwidth_queue[channel].rend() && i->non_prioritized) ++i;
+			while (i != m_bandwidth_queue[channel].rend() && priority > i->priority)
+			{
+				++i->priority;
+				++i;
+			}
 			m_bandwidth_queue[channel].insert(i.base(), bw_queue_entry<peer_connection>(
-				p, block_size, non_prioritized));
+				p, block_size, priority));
 		}
 	}
 
@@ -2276,7 +2278,7 @@ namespace libtorrent
 				continue;
 			}
 			perform_bandwidth_request(channel, qe.peer
-				, qe.max_block_size, qe.non_prioritized);
+				, qe.max_block_size, qe.priority);
 		}
 		m_bandwidth_queue[channel].insert(m_bandwidth_queue[channel].begin(), tmp.begin(), tmp.end());
 	}
@@ -2284,10 +2286,10 @@ namespace libtorrent
 	void torrent::perform_bandwidth_request(int channel
 		, boost::intrusive_ptr<peer_connection> const& p
 		, int block_size
-		, bool non_prioritized)
+		, int priority)
 	{
 		m_ses.m_bandwidth_manager[channel]->request_bandwidth(p
-			, block_size, non_prioritized);
+			, block_size, priority);
 		m_bandwidth_limit[channel].assign(block_size);
 	}
 
@@ -2620,6 +2622,16 @@ namespace libtorrent
 		TORRENT_ASSERT(m_bandwidth_queue[0].size() <= m_connections.size());
 		TORRENT_ASSERT(m_bandwidth_queue[1].size() <= m_connections.size());
 
+		for (int c = 0; c < 2; ++c)
+		{
+			queue_t::const_iterator j = m_bandwidth_queue[c].begin();
+			if (j == m_bandwidth_queue[c].end()) continue;
+			++j;
+			for (queue_t::const_iterator i = m_bandwidth_queue[c].begin()
+				, end(m_bandwidth_queue[c].end()); i != end && j != end; ++i, ++j)
+				TORRENT_ASSERT(i->priority >= j->priority);
+		}
+
 		int num_uploads = 0;
 		std::map<piece_block, int> num_requests;
 		for (const_peer_iterator i = begin(); i != end(); ++i)
@@ -3063,6 +3075,9 @@ namespace libtorrent
 
 		torrent_status st;
 
+		st.up_bandwidth_queue = (int)m_bandwidth_queue[peer_connection::upload_channel].size();
+		st.down_bandwidth_queue = (int)m_bandwidth_queue[peer_connection::download_channel].size();
+
 		st.num_peers = (int)std::count_if(m_connections.begin(), m_connections.end()
 			, !boost::bind(&peer_connection::is_connecting, _1));
 
diff --git a/libtorrent/src/web_peer_connection.cpp b/libtorrent/src/web_peer_connection.cpp
index 71ce2d430..54eefb8fc 100755
--- a/libtorrent/src/web_peer_connection.cpp
+++ b/libtorrent/src/web_peer_connection.cpp
@@ -73,7 +73,7 @@ namespace libtorrent
 		// we can request more bytes at once
 		request_large_blocks(true);
 		// we only want left-over bandwidth
-		set_non_prioritized(true);
+		set_priority(0);
 		shared_ptr<torrent> tor = t.lock();
 		TORRENT_ASSERT(tor);
 		int blocks_per_piece = tor->torrent_file().piece_length() / tor->block_size();