costmo writes "We have discovered a very serious and repeatable bug in the way IE7 handles swapping div layer visibility. We haven't seen too much mention of this bug online except for a few people saying "should be fixed in beta 2." We were wondering if anyone else has been struggling with this (we can't be the only ones!), and what they are doing about it. More importantly, what can we do to get Microsoft's attention to fix the problem? The write-up of our results with code and usable examples is here."