This is something that's been bugging me for quite some time.
I'm attaching a screenshot of the issue as seen in Microsoft Office Word 2007.
While it doesn't get in the way when it's like this, I've had to uninstall other apps as the black artefacts affected usability.
Here is the same issue in Excel 2007.
I'm running 32-bit Ubuntu 10.10, with an Intel 945 chipset.