Lately, when I edit a post and send the edit, my signature disappears. It doesn't show up in any new post I write after that either. I can get it back by "reapplying" my profile, but it shouldn't be going away in the first place, should it? Is there something I'm doing (or not doing) to cause this? Has anybody else had this problem? The "Attach signature" box is still ticked and in my profile "Show signature" is still set on "Yes" when this happens.