User blog comment:Dopp/Technical Update: January 10, 2012/@comment-1474707-20120110221900/@comment-1656630-20120111192526

Ah, okay, I think I see it now. When you add a category to the bottom of an existing page, the autocorrect appears further up in the editing window so as not to be cut off. When you add a category to a new page, the autocorrect appears where you are typing, and is cut off.

Interesting, I could reproduce this on Firefox, but it seems to be working fine on Chrome.

I'll get it reported. Thanks.