--- a/hgext/mq.py	Mon Mar 03 19:41:23 2014 +0900
+++ b/hgext/mq.py	Mon Mar 03 19:41:26 2014 +0900
@@ -3269,6 +3269,11 @@
         def mq(self):
             return queue(self.ui, self.baseui, self.path)
 
+        def invalidateall(self):
+            super(mqrepo, self).invalidateall()
+            if localrepo.hasunfilteredcache(self, 'mq'):
+                self.mq.invalidate()
+
         def abortifwdirpatched(self, errmsg, force=False):
             if self.mq.applied and self.mq.checkapplied and not force:
                 parents = self.dirstate.parents()

--- a/tests/test-commandserver.py	Mon Mar 03 19:41:23 2014 +0900
+++ b/tests/test-commandserver.py	Mon Mar 03 19:41:26 2014 +0900
@@ -274,6 +274,15 @@
     runcommand(server, ['log', '--hidden'])
     runcommand(server, ['log'])
 
+def mqoutsidechanges(server):
+    readchannel(server)
+
+    # load repo.mq
+    runcommand(server, ['qapplied'])
+    os.system('hg qnew 0.diff')
+    # repo.mq should be invalidated
+    runcommand(server, ['qapplied'])
+
 if __name__ == '__main__':
     os.system('hg init')
 
@@ -304,3 +313,7 @@
     hgrc.write('[extensions]\nobs=obs.py\n')
     hgrc.close()
     check(obsolete)
+    hgrc = open('.hg/hgrc', 'a')
+    hgrc.write('[extensions]\nmq=\n')
+    hgrc.close()
+    check(mqoutsidechanges)

--- a/tests/test-commandserver.py.out	Mon Mar 03 19:41:23 2014 +0900
+++ b/tests/test-commandserver.py.out	Mon Mar 03 19:41:26 2014 +0900
@@ -222,3 +222,9 @@
 date:        Thu Jan 01 00:00:00 1970 +0000
 summary:     1
 
+
+testing mqoutsidechanges:
+
+ runcommand qapplied
+ runcommand qapplied
+0.diff