Comment 24 for bug 327863

Doesn't work; still got the assertions. I tried several variations on your suggestion, some of which actually make *vertical* scrollbars start showing up when they shouldn't.

My best guess for why it doesn't work is that some of the other things nsBoxFrame::Reflow does, when called under these conditions, are inconsistent with having aDesiredSize forced to the original size.

On a more positive note, I've figured out why it was only showing up in xvfb: the phenomenon is gtk-theme dependent. For instance, "Clearlooks" doesn't do it, but "Glider" does.