- $memc->delete(common_cache_key('user:notices_with_friends:'. $user->id));
- $memc->delete(common_cache_key('user:notices_with_friends:'. $user->id . ';last'));
+ $memc->delete(Cache::key('user:notices_with_friends:'. $user->id));
+ $memc->delete(Cache::key('user:notices_with_friends:'. $user->id . ';last'));