Fix error when sending stats (quote_plus expects string not list).

deluge/core/preferencesmanager.py

@@ -458,8 +458,9 @@ class PreferencesManager(component.Component):
                         url = "http://deluge-torrent.org/stats_get.php?processor=" + \
                             platform.machine() + "&python=" + platform.python_version() \
                             + "&deluge=" + deluge.common.get_version() \
-                            + "&os=" + platform.system() \
-                            + "&plugins=" + quote_plus(self.config["enabled_plugins"])
+                            + "&os=" + platform.system()
+                        for plugin in self.config["enabled_plugins"]:
+                            url += "&plugins=" + quote_plus(plugin)
                         urlopen(url)
                     except IOError, e:
                         log.debug("Network error while trying to send info: %s", e)