Mouse-over info text boxes black

The yellowish "help/information" boxes which appear when you place the mouse over something of interest (desktop applet, a program's button [e.g. the refresh button in firefox]) as well as system notifications (USB drive unmounted, new upgrades available) are now sharp pitch black squares. I'm not sure which package this pertains to, but this is a new bug as of 9/20's morning updates. I'm using Gutsy x86_84 with the intel video driver (GMA3100 onboard). I'll attach a screenshot of what's happening (in the top left corner).