I noticed GHawkins' post on probably the same issue but relevant to Office
2003.

I didn't have this problem with 2003. It first appeared when I removed 2003
and installed 2007.

It also happens to 3 HP machines of a client, the first (and only) ones with
Office 2007. I can't imagine all of us having problems with our drivers. My
clients' PCs use Intel graphics chips, I use Nvidia GeForce 5700.

Anything else?