Comment 27 for bug 872207

@Andres and Sean: Most excellent, thanks. :) So, the disappearing menu issue is then not likely due to upgrade issues.

@Andres: I agree, I think that Compiz is definitely implicated. That this problem only occurs with Mozilla apps -- as far as anyone has reported -- seems to narrow it down to at least a Compiz-Mozilla interaction.

I'm beginning to wonder, since the compositing manager seems clearly implicated, if the problem might be related to (a) themes (doubt it, tho') or perhaps (b) transparent menus (which I have enabled with Ubuntu Tweak). I've disabled the latter and will report back if perhaps that corrects the problem.

Perhaps someone has never enabled transparent windows and/or only used default themes and yet still has the problem?