This is very minor and clearly not a show-stopper but I notice a lot of flicker in my backend Joomla menus using IE7 when in a CB configuration screen.

For example, I go to CB -> List management -> Member List and then do an onmoouseover the core menus..flickers and fades in and out, almost like there's a db call going on, but there's not, if that makes sense.

It's perfect in FF, of course, just see it with Internet Destoyer.