Empty thread.local() at beginning of each request.

misago/middleware/thread.py

@@ -0,0 +1,5 @@
+from misago.thread import clear
+
+class ThreadMiddleware(object):
+    def process_request(self, request):
+        clear()

misago/settings_base.py

@@ -105,6 +105,7 @@ JINJA2_AUTOESCAPE = True
 
 # List of application middlewares
 MIDDLEWARE_CLASSES = (
+    'misago.middleware.thread.ThreadMiddleware',
     'misago.middleware.stopwatch.StopwatchMiddleware',
     'misago.middleware.heartbeat.HeartbeatMiddleware',
     'debug_toolbar.middleware.DebugToolbarMiddleware',