diff --git a/chain/block_manager.go b/chain/block_manager.go
index e652ad10e..4cc43840c 100644
--- a/chain/block_manager.go
+++ b/chain/block_manager.go
@@ -155,10 +155,11 @@ done:
 			}
 		}
 
-		// Update the state with pending changes
-		state.Update()
-
 		txGas.Sub(txGas, st.gas)
+
+		// Update the state with pending changes
+		state.Update(txGas)
+
 		cumulative := new(big.Int).Set(totalUsedGas.Add(totalUsedGas, txGas))
 		receipt := types.NewReceipt(state.Root(), cumulative)
 		receipt.SetLogs(state.Logs())
@@ -247,7 +248,7 @@ func (sm *BlockManager) ProcessWithParent(block, parent *types.Block) (td *big.I
 		return
 	}
 
-	state.Update()
+	state.Update(nil)
 
 	if !block.State().Cmp(state) {
 		err = fmt.Errorf("invalid merkle root. received=%x got=%x", block.Root(), state.Root())
diff --git a/chain/chain_manager.go b/chain/chain_manager.go
index 11e16fa7d..115acb1c8 100644
--- a/chain/chain_manager.go
+++ b/chain/chain_manager.go
@@ -112,8 +112,6 @@ func (bc *ChainManager) NewBlock(coinbase []byte) *types.Block {
 		nil,
 		"")
 
-	block.MinGasPrice = big.NewInt(10000000000000)
-
 	parent := bc.CurrentBlock
 	if parent != nil {
 		block.Difficulty = CalcDifficulty(block, parent)
diff --git a/chain/genesis.go b/chain/genesis.go
index 14117a82c..85e85d1ed 100644
--- a/chain/genesis.go
+++ b/chain/genesis.go
@@ -37,8 +37,6 @@ var GenesisHeader = []interface{}{
 	big.NewInt(131072),
 	// Number
 	ethutil.Big0,
-	// Block minimum gas price
-	ethutil.Big0,
 	// Block upper gas bound
 	big.NewInt(1000000),
 	// Block gas used
diff --git a/chain/state_transition.go b/chain/state_transition.go
index 789698675..53b1f6e2d 100644
--- a/chain/state_transition.go
+++ b/chain/state_transition.go
@@ -157,12 +157,24 @@ func (self *StateTransition) TransitionState() (err error) {
 	}
 
 	// Pay data gas
-	dataPrice := big.NewInt(int64(len(self.data)))
-	dataPrice.Mul(dataPrice, vm.GasData)
-	if err = self.UseGas(dataPrice); err != nil {
+	var dgas int64
+	for _, byt := range self.data {
+		if byt != 0 {
+			dgas += vm.GasData.Int64()
+		} else {
+			dgas += 1 // This is 1/5. If GasData changes this fails
+		}
+	}
+	if err = self.UseGas(big.NewInt(dgas)); err != nil {
 		return
 	}
 
+	//dataPrice := big.NewInt(int64(len(self.data)))
+	//dataPrice.Mul(dataPrice, vm.GasData)
+	//if err = self.UseGas(dataPrice); err != nil {
+	//	return
+	//}
+
 	if sender.Balance().Cmp(self.value) < 0 {
 		return fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, sender.Balance)
 	}
diff --git a/chain/types/block.go b/chain/types/block.go
index b311433e3..5c8bb5f6c 100644
--- a/chain/types/block.go
+++ b/chain/types/block.go
@@ -84,8 +84,6 @@ type Block struct {
 	Time int64
 	// The block number
 	Number *big.Int
-	// Minimum Gas Price
-	MinGasPrice *big.Int
 	// Gas limit
 	GasLimit *big.Int
 	// Gas used
@@ -124,16 +122,15 @@ func CreateBlock(root interface{},
 	extra string) *Block {
 
 	block := &Block{
-		PrevHash:    prevHash,
-		Coinbase:    base,
-		Difficulty:  Difficulty,
-		Nonce:       Nonce,
-		Time:        time.Now().Unix(),
-		Extra:       extra,
-		UncleSha:    nil,
-		GasUsed:     new(big.Int),
-		MinGasPrice: new(big.Int),
-		GasLimit:    new(big.Int),
+		PrevHash:   prevHash,
+		Coinbase:   base,
+		Difficulty: Difficulty,
+		Nonce:      Nonce,
+		Time:       time.Now().Unix(),
+		Extra:      extra,
+		UncleSha:   nil,
+		GasUsed:    new(big.Int),
+		GasLimit:   new(big.Int),
 	}
 	block.SetUncles([]*Block{})
 
@@ -300,12 +297,11 @@ func (self *Block) setHeader(header *ethutil.Value) {
 	self.LogsBloom = header.Get(6).Bytes()
 	self.Difficulty = header.Get(7).BigInt()
 	self.Number = header.Get(8).BigInt()
-	self.MinGasPrice = header.Get(9).BigInt()
-	self.GasLimit = header.Get(10).BigInt()
-	self.GasUsed = header.Get(11).BigInt()
-	self.Time = int64(header.Get(12).BigInt().Uint64())
-	self.Extra = header.Get(13).Str()
-	self.Nonce = header.Get(14).Bytes()
+	self.GasLimit = header.Get(9).BigInt()
+	self.GasUsed = header.Get(10).BigInt()
+	self.Time = int64(header.Get(11).BigInt().Uint64())
+	self.Extra = header.Get(12).Str()
+	self.Nonce = header.Get(13).Bytes()
 }
 
 func NewUncleBlockFromValue(header *ethutil.Value) *Block {
@@ -351,8 +347,6 @@ func (block *Block) miningHeader() []interface{} {
 		block.Difficulty,
 		// The block number
 		block.Number,
-		// Block minimum gas price
-		block.MinGasPrice,
 		// Block upper gas bound
 		block.GasLimit,
 		// Block gas used
@@ -380,7 +374,6 @@ func (block *Block) String() string {
 	Bloom:      %x
 	Difficulty: %v
 	Number:     %v
-	MinGas:     %v
 	MaxLimit:   %v
 	GasUsed:    %v
 	Time:       %v
@@ -399,7 +392,6 @@ func (block *Block) String() string {
 		block.LogsBloom,
 		block.Difficulty,
 		block.Number,
-		block.MinGasPrice,
 		block.GasLimit,
 		block.GasUsed,
 		block.Time,
diff --git a/cmd/ethereum/main.go b/cmd/ethereum/main.go
index aa933c4e7..c351167f2 100644
--- a/cmd/ethereum/main.go
+++ b/cmd/ethereum/main.go
@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"os"
 	"runtime"
+
 	"github.com/ethereum/go-ethereum/chain/types"
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/ethutil"
@@ -29,7 +30,7 @@ import (
 
 const (
 	ClientIdentifier = "Ethereum(G)"
-	Version          = "0.7.5"
+	Version          = "0.7.6"
 )
 
 var clilogger = logger.NewLogger("CLI")
diff --git a/cmd/mist/main.go b/cmd/mist/main.go
index bc05d4f3d..39beeafdb 100644
--- a/cmd/mist/main.go
+++ b/cmd/mist/main.go
@@ -31,7 +31,7 @@ import (
 
 const (
 	ClientIdentifier = "Mist"
-	Version          = "0.7.5"
+	Version          = "0.7.6"
 )
 
 var ethereum *eth.Ethereum
diff --git a/install.sh b/install.sh
index f6232af83..30a3802e4 100755
--- a/install.sh
+++ b/install.sh
@@ -1,15 +1,20 @@
 #!/bin/sh
 
 if [ "$1" == "" ]; then
-	echo "Usage $0 executable branch ethereum develop"
-	echo "executable    ethereum or mist"
-	echo "branch        develop or master"
+	echo "Usage $0 executable branch"
+	echo "executable    ethereum | mist"
+	echo "branch        develop | master"
 	exit
 fi
 
 exe=$1
+path=$exe
 branch=$2
 
+if [ "$branch" == "develop" ]; then
+	path="cmd/$exe"
+fi
+
 # Test if go is installed
 command -v go >/dev/null 2>&1 || { echo >&2 "Unable to find 'go'. This script requires go."; exit 1; }
 
@@ -19,20 +24,23 @@ if [ "$GOPATH" == "" ]; then
 	exit
 fi
 
-echo "go get -u -d github.com/ethereum/go-ethereum/$exe"
-go get -v -u -d github.com/ethereum/go-ethereum/$exe
-if [ $? != 0 ]; then
-	echo "go get failed"
-	exit
-fi
-
-echo "eth-go"
+echo "changing branch to $branch"
 cd $GOPATH/src/github.com/ethereum/go-ethereum
 git checkout $branch
 
-echo "go-ethereum"
-cd $GOPATH/src/github.com/ethereum/go-ethereum/$exe
-git checkout $branch
+# installing package dependencies doesn't work for develop
+# branch as go get always pulls from master head
+# so build will continue to fail, but this installs locally
+# for people who git clone since go install will manage deps
+
+#echo "go get -u -d github.com/ethereum/go-ethereum/$path"
+#go get -v -u -d github.com/ethereum/go-ethereum/$path
+#if [ $? != 0 ]; then
+#	echo "go get failed"
+#	exit
+#fi
+
+cd $GOPATH/src/github.com/ethereum/go-ethereum/$path
 
 if [ "$exe" == "mist" ]; then
 	echo "Building Mist GUI. Assuming Qt is installed. If this step"
@@ -42,9 +50,4 @@ else
 fi
 
 go install
-if [ $? == 0 ]; then
-	echo "go install failed"
-	exit
-fi
-
 echo "done. Please run $exe :-)"
diff --git a/miner/miner.go b/miner/miner.go
index 795385424..c5bff5690 100644
--- a/miner/miner.go
+++ b/miner/miner.go
@@ -179,7 +179,6 @@ func (self *Miner) mine() {
 		chainMan     = self.eth.ChainManager()
 		block        = chainMan.NewBlock(self.Coinbase)
 	)
-	block.MinGasPrice = self.MinAcceptedGasPrice
 
 	// Apply uncles
 	if len(self.uncles) > 0 {
@@ -206,7 +205,7 @@ func (self *Miner) mine() {
 	// Accumulate the rewards included for this block
 	blockManager.AccumelateRewards(block.State(), block, parent)
 
-	block.State().Update()
+	block.State().Update(nil)
 
 	minerlogger.Infof("Mining on block. Includes %v transactions", len(transactions))
 
diff --git a/peer.go b/peer.go
index ff3593604..e01f11914 100644
--- a/peer.go
+++ b/peer.go
@@ -24,7 +24,7 @@ const (
 	// The size of the output buffer for writing messages
 	outputBufferSize = 50
 	// Current protocol version
-	ProtocolVersion = 43
+	ProtocolVersion = 45
 	// Current P2P version
 	P2PVersion = 2
 	// Ethereum network version
diff --git a/state/state.go b/state/state.go
index 3abf1545b..0a7f717fe 100644
--- a/state/state.go
+++ b/state/state.go
@@ -23,14 +23,14 @@ type State struct {
 
 	manifest *Manifest
 
-	refund map[string]*big.Int
+	refund map[string][]refund
 
 	logs Logs
 }
 
 // Create a new state from a given trie
 func New(trie *trie.Trie) *State {
-	return &State{Trie: trie, stateObjects: make(map[string]*StateObject), manifest: NewManifest(), refund: make(map[string]*big.Int)}
+	return &State{Trie: trie, stateObjects: make(map[string]*StateObject), manifest: NewManifest(), refund: make(map[string][]refund)}
 }
 
 func (self *State) EmptyLogs() {
@@ -55,14 +55,12 @@ func (self *State) GetBalance(addr []byte) *big.Int {
 	return ethutil.Big0
 }
 
+type refund struct {
+	gas, price *big.Int
+}
+
 func (self *State) Refund(addr []byte, gas, price *big.Int) {
-	amount := new(big.Int).Mul(gas, price)
-
-	if self.refund[string(addr)] == nil {
-		self.refund[string(addr)] = new(big.Int)
-	}
-
-	self.refund[string(addr)].Add(self.refund[string(addr)], amount)
+	self.refund[string(addr)] = append(self.refund[string(addr)], refund{gas, price})
 }
 
 func (self *State) AddBalance(addr []byte, amount *big.Int) {
@@ -276,15 +274,20 @@ func (s *State) Sync() {
 
 func (self *State) Empty() {
 	self.stateObjects = make(map[string]*StateObject)
-	self.refund = make(map[string]*big.Int)
+	self.refund = make(map[string][]refund)
 }
 
-func (self *State) Update() {
+func (self *State) Update(gasUsed *big.Int) {
 	var deleted bool
 
 	// Refund any gas that's left
-	for addr, amount := range self.refund {
-		self.GetStateObject([]byte(addr)).AddBalance(amount)
+	uhalf := new(big.Int).Div(gasUsed, ethutil.Big2)
+	for addr, refs := range self.refund {
+		for _, ref := range refs {
+			refund := ethutil.BigMin(uhalf, ref.gas)
+
+			self.GetStateObject([]byte(addr)).AddBalance(refund.Mul(refund, ref.price))
+		}
 	}
 
 	for _, stateObject := range self.stateObjects {