Board Thread:General Discussion/@comment-4839035-20130326183707/@comment-5275700-20130328184743

The RecentChanges filter remembers your namespace selections from the last time you used it, Wikia-wide.

I've learned that the namespaces exist on all wikis, all the time. This allows someone to receive a Message Wall notification from a Wall wiki, even when on a non-Wall wiki. It's been this way for some time, nothing has changed recently.

But I agree that the filters need some additional cleanup, there's no reason for those to be listed if the feature is not enabled on a wiki. Thanks for bringing this up, I will file some bugs for this.