diff --git a/README.rst b/README.rst
index 14ef6c5ac..714ad6443 100644
--- a/README.rst
+++ b/README.rst
@@ -86,7 +86,7 @@ Homeserver Installation
 =======================
 
 System requirements:
-- POSIX-compliant system (tested on Linux & OSX)
+- POSIX-compliant system (tested on Linux & OS X)
 - Python 2.7
 
 Synapse is written in python but some of the libraries is uses are written in
@@ -128,6 +128,15 @@ To set up your homeserver, run (in your virtualenv, as before)::
 
 Substituting your host and domain name as appropriate.
 
+This will generate you a config file that you can then customise, but it will
+also generate a set of keys for you. These keys will allow your Home Server to
+identify itself to other Home Servers, so don't lose or delete them. It would be
+wise to back them up somewhere safe. If, for whatever reason, you do need to
+change your Home Server's keys, you may find that other Home Servers have the
+old key cached. If you update the signing key, you should change the name of the
+key in the <server name>.signing.key file (the second word, which by default is
+, 'auto') to something different.
+
 By default, registration of new users is disabled. You can either enable
 registration in the config by specifying ``enable_registration: true``
 (it is then recommended to also set up CAPTCHA), or
@@ -367,10 +376,6 @@ SRV record, as that is the name other machines will expect it to have::
 You may additionally want to pass one or more "-v" options, in order to
 increase the verbosity of logging output; at least for initial testing.
 
-For the initial alpha release, the homeserver is not speaking TLS for
-either client-server or server-server traffic for ease of debugging. We have
-also not spent any time yet getting the homeserver to run behind loadbalancers.
-
 Running a Demo Federation of Homeservers
 ----------------------------------------
 
@@ -433,7 +438,7 @@ track 3PID logins and publish end-user public keys.
 
 It's currently early days for identity servers as Matrix is not yet using 3PIDs
 as the primary means of identity and E2E encryption is not complete. As such,
-we are running a single identity server (http://matrix.org:8090) at the current
+we are running a single identity server (https://matrix.org) at the current
 time.
 
 
diff --git a/synapse/crypto/keyring.py b/synapse/crypto/keyring.py
index f7ae22791..0d24aa7ac 100644
--- a/synapse/crypto/keyring.py
+++ b/synapse/crypto/keyring.py
@@ -26,6 +26,8 @@ from synapse.api.errors import SynapseError, Codes
 
 from synapse.util.retryutils import get_retry_limiter
 
+from synapse.util.async import create_observer
+
 from OpenSSL import crypto
 
 import urllib
@@ -45,6 +47,8 @@ class Keyring(object):
         self.perspective_servers = self.config.perspectives
         self.hs = hs
 
+        self.key_downloads = {}
+
     @defer.inlineCallbacks
     def verify_json_for_server(self, server_name, json_object):
         logger.debug("Verifying for %s", server_name)
@@ -103,6 +107,22 @@ class Keyring(object):
             defer.returnValue(cached[0])
             return
 
+        download = self.key_downloads.get(server_name)
+
+        if download is None:
+            download = self._get_server_verify_key_impl(server_name, key_ids)
+            self.key_downloads[server_name] = download
+
+            @download.addBoth
+            def callback(ret):
+                del self.key_downloads[server_name]
+                return ret
+
+        r = yield create_observer(download)
+        defer.returnValue(r)
+
+    @defer.inlineCallbacks
+    def _get_server_verify_key_impl(self, server_name, key_ids):
         keys = None
         for perspective_name, perspective_keys in self.perspective_servers.items():
             try:
diff --git a/synapse/push/baserules.py b/synapse/push/baserules.py
index f8408d659..f3d1cf5c5 100644
--- a/synapse/push/baserules.py
+++ b/synapse/push/baserules.py
@@ -126,7 +126,25 @@ def make_base_prepend_override_rules():
 def make_base_append_override_rules():
     return [
         {
-            'rule_id': 'global/override/.m.rule.call',
+            'rule_id': 'global/override/.m.rule.suppress_notices',
+            'conditions': [
+                {
+                    'kind': 'event_match',
+                    'key': 'content.msgtype',
+                    'pattern': 'm.notice',
+                }
+            ],
+            'actions': [
+                'dont_notify',
+            ]
+        }
+    ]
+
+
+def make_base_append_underride_rules(user):
+    return [
+        {
+            'rule_id': 'global/underride/.m.rule.call',
             'conditions': [
                 {
                     'kind': 'event_match',
@@ -145,19 +163,6 @@ def make_base_append_override_rules():
                 }
             ]
         },
-        {
-            'rule_id': 'global/override/.m.rule.suppress_notices',
-            'conditions': [
-                {
-                    'kind': 'event_match',
-                    'key': 'content.msgtype',
-                    'pattern': 'm.notice',
-                }
-            ],
-            'actions': [
-                'dont_notify',
-            ]
-        },
         {
             'rule_id': 'global/override/.m.rule.contains_display_name',
             'conditions': [
@@ -176,7 +181,7 @@ def make_base_append_override_rules():
             ]
         },
         {
-            'rule_id': 'global/override/.m.rule.room_one_to_one',
+            'rule_id': 'global/underride/.m.rule.room_one_to_one',
             'conditions': [
                 {
                     'kind': 'room_member_count',
@@ -193,12 +198,7 @@ def make_base_append_override_rules():
                     'value': False
                 }
             ]
-        }
-    ]
-
-
-def make_base_append_underride_rules(user):
-    return [
+        },
         {
             'rule_id': 'global/underride/.m.rule.invite_for_me',
             'conditions': [
diff --git a/synapse/rest/media/v1/base_resource.py b/synapse/rest/media/v1/base_resource.py
index edd4f7802..08c8d75af 100644
--- a/synapse/rest/media/v1/base_resource.py
+++ b/synapse/rest/media/v1/base_resource.py
@@ -25,6 +25,8 @@ from twisted.internet import defer
 from twisted.web.resource import Resource
 from twisted.protocols.basic import FileSender
 
+from synapse.util.async import create_observer
+
 import os
 
 import logging
@@ -87,7 +89,7 @@ class BaseMediaResource(Resource):
             def callback(media_info):
                 del self.downloads[key]
                 return media_info
-        return download
+        return create_observer(download)
 
     @defer.inlineCallbacks
     def _get_remote_media_impl(self, server_name, media_id):
diff --git a/synapse/util/async.py b/synapse/util/async.py
index c4fe5d522..d8febdb90 100644
--- a/synapse/util/async.py
+++ b/synapse/util/async.py
@@ -32,3 +32,22 @@ def run_on_reactor():
     iteration of the main loop
     """
     return sleep(0)
+
+
+def create_observer(deferred):
+    """Creates a deferred that observes the result or failure of the given
+     deferred *without* affecting the given deferred.
+    """
+    d = defer.Deferred()
+
+    def callback(r):
+        d.callback(r)
+        return r
+
+    def errback(f):
+        d.errback(f)
+        return f
+
+    deferred.addCallbacks(callback, errback)
+
+    return d