After IE 7 Beta 1 was released, Chris Wilson posted a list of rendering engine bugs that will be fixed in IE 7 Beta 2. Most of the bugs were described in detail at PositionIsEverything and QuirksMode, some with cute names like Peekaboo. Many of these are the bugs that really get in the way of doing decent site styling in IE.
As we're working on our next major rendering engine update, I wonder what are the rendering engine bugs that affect site designers when working with Opera. Please let us know by posting a comment here or posting in your own blog and sending a trackback here. We almost definitely won't be able to fix all of the reported problems, but at least we can take a crack at them. Please provide a clear description of the bug, the bug number in our BTS (if known), and a minimal test case, if possible.
Note that I am not asking for your pet bugs. I want to know which bugs cause problems on a day-to-day basis when working with Opera's rendering engine. Also, I'm not talking about missing features.