Index: trac/perm.py
===================================================================
--- trac/perm.py	(revision 6489)
+++ trac/perm.py	(working copy)
@@ -273,10 +273,11 @@
             self.permission_cache = {}
             self.last_reap = time()
 
-        timestamp, permissions = self.permission_cache.get(username, (0, None))
+        ### DEBUG
+        ### timestamp, permissions = self.permission_cache.get(username, (0, None))
 
         # Cache hit?
-        if now - timestamp > self.CACHE_EXPIRY:
+        if True: ### now - timestamp > self.CACHE_EXPIRY:
             # No, pull permissions from database.
             permissions = PermissionSystem(self.env). \
                           get_user_permissions(username)