I find a little bug, with Firefox only on Linux (tested with Ubuntu feisty fawn and Ubuntu Gutsy Gibbon)
It happen with the control panel, hi don't know how to explain it in English so i made a screenshot. Same problem on your own site.http://img99.imageshack.us/slideshow/player.php?id=img99/9181/11925267932id.smil
It's not something important for me, i don't need any fix, it was just to let you know.
By the way, if you need some test on Linux for your templates, I'm your man.