I've checked in multiple browsers using browsershots.org, and only the ones from Opera 10 and Firefox 3.1 were OK, the rest were broken (example: Firefox 3.0: http://dl.getdropbox.com/u/41808/ff3win.png).
It looks like this might be the answer: http://osdir.com/ml/jquery-dev/2009-03/msg00185.html (although apparently it wasn't fixed since March - it still breaks in my Firefox on jquery-nightly (jquery-1.3.1 works, 1.3.2 doesn't). JS
