Just inquiring if this is a known Firefox bug or not: I have a page using BlindUp and BlindDown to open and close sections of content backed w/ an AJAX call. The sequence of events is this: 1. BlindUp one section 2. Ajax.Update to update a hidden section 3. onComplete callback does a BlindDown of hidden section Lets say we have a moderate length page that requires a scrollbar to be visible . When the BlindUp occurs, the content collapses and scrollbar disappears. The content scoots out a bit because the real estate once taken up by the scrollbar is freed up. When the BlindDown occurs, a scrollbar has to reappear. At this point, IE and Opera resize the client area. But on FireFox, it just drops the scrollbar down without resizing the client area. This results in the appearance of the horizontal scrollbar at the bottom of the window. So anyone know if this is a bug? I suppose I could mitigate the problem by swapping the order of events.. do a blind down then blind up. But it looks hokey.