I've had this with previous versions as well as the beta I'm running (.0689)

I have a number of groups I collect my buddies in.  On expanding the group the tooltip is pretty sharpish at showing, and so the tooltip covers the top user (more if the icons aren't large)  To just expand a user group to see if there is anyone I want to talk to in there is a nuisance because I have to expand the menu, then move the mouse (to remove the tooltip from covering the user).  Doing this on more than one group at a time is tedious and unnecessary.  Could be solved either by a longer delay on the tooltip, or a number of ways, but it really grinds my gears...