Toolbars always visible in media center full-screen

Windows Vista Ultimate Media Center: When media center is maximised to
full-screen the toolbars are always on screen. When restored down the tool
bars correctly only appear with mouse movement.

How can I make the toolbars go away in full screen mode? It's distracting
when watching recorded tv.

Ok, I fixed it by installing the latest graphics adapter driver - only two
weeks old.