diff --git a/CHANGES.rst b/CHANGES.rst
index 297ae914fd..922fa5b035 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,3 +1,8 @@
+Changes in develop
+==================
+
+ * pydenticon support -- adds dep on pydenticon
+
 Changes in synapse 0.6.1 (2015-01-07)
 =====================================
 
diff --git a/scripts/check_auth.py b/scripts/check_auth.py
new file mode 100644
index 0000000000..b889ac7fa7
--- /dev/null
+++ b/scripts/check_auth.py
@@ -0,0 +1,65 @@
+from synapse.events import FrozenEvent
+from synapse.api.auth import Auth
+
+from mock import Mock
+
+import argparse
+import itertools
+import json
+import sys
+
+
+def check_auth(auth, auth_chain, events):
+    auth_chain.sort(key=lambda e: e.depth)
+
+    auth_map = {
+        e.event_id: e
+        for e in auth_chain
+    }
+
+    create_events = {}
+    for e in auth_chain:
+        if e.type == "m.room.create":
+            create_events[e.room_id] = e
+
+    for e in itertools.chain(auth_chain, events):
+        auth_events_list = [auth_map[i] for i, _ in e.auth_events]
+
+        auth_events = {
+            (e.type, e.state_key): e
+            for e in auth_events_list
+        }
+
+        auth_events[("m.room.create", "")] = create_events[e.room_id]
+
+        try:
+            auth.check(e, auth_events=auth_events)
+        except Exception as ex:
+            print "Failed:", e.event_id, e.type, e.state_key
+            print "Auth_events:", auth_events
+            print ex
+            print json.dumps(e.get_dict(), sort_keys=True, indent=4)
+            # raise
+        print "Success:", e.event_id, e.type, e.state_key
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+
+    parser.add_argument(
+        'json',
+        nargs='?',
+        type=argparse.FileType('r'),
+        default=sys.stdin,
+    )
+
+    args = parser.parse_args()
+
+    js = json.load(args.json)
+
+
+    auth = Auth(Mock())
+    check_auth(
+        auth,
+        [FrozenEvent(d) for d in js["auth_chain"]],
+        [FrozenEvent(d) for d in js["pdus"]],
+    )
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index 6fbd2af4ab..3f51f38f18 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -16,7 +16,7 @@
 from twisted.internet import defer
 
 from synapse.api.constants import EventTypes, Membership
-from synapse.api.errors import RoomError
+from synapse.api.errors import RoomError, SynapseError
 from synapse.streams.config import PaginationConfig
 from synapse.events.utils import serialize_event
 from synapse.events.validator import EventValidator
@@ -372,10 +372,17 @@ class MessageHandler(BaseHandler):
                     as_event=True,
                 )
                 presence.append(member_presence)
-            except Exception:
-                logger.exception(
-                    "Failed to get member presence of %r", m.user_id
-                )
+            except SynapseError as e:
+                if e.code == 404:
+                    # FIXME: We are doing this as a warn since this gets hit a
+                    # lot and spams the logs. Why is this happening?
+                    logger.warn(
+                        "Failed to get member presence of %r", m.user_id
+                    )
+                else:
+                    logger.exception(
+                        "Failed to get member presence of %r", m.user_id
+                    )
 
         time_now = self.clock.time_msec()