Catch Exception instead of ValueError for accessing our general content cache...

Catch Exception instead of ValueError for accessing our general content cache -- exception thrown changed in django 1.4

lib/util/cache.py

@@ -11,6 +11,6 @@ from django.core import cache
 # to returning the default cache. This will happen with dev machines.
 try:
     cache = cache.get_cache('general')
-except ValueError:
+except Exception:
     cache = cache.cache