I just answered this question, then deleted the answer because I realized what I said had already been covered. After deleting, I editing in a note saying why I deleted it, but that edit bumped the question on the home page.
I assume that the question will get bumped if I undelete the answer (which is proper behaviour), but I think in the case where someone edits a deleted answer, there's no point bumping the question for content that most people aren't going to see (and since the answer is deleted, shouldn't be seen anyway).
EDIT: A nifty way to abuse the system (10k+ only!).