black blocks in firefox images
 

In firefox 3.0.6 on slackware 12.2 I frequently see black blocks in images, especially when I zoom in. Has anyone else run into this and found a workaround?

Here is a screen shot of firefox displaying a normal page.
http://bencollver.googlepages.com/ss1.jpg

Here is a screen shot of the same page zoomed in. Notice the black blocks.
http://bencollver.googlepages.com/ss2.jpg

resolution
 

I ran into an Xorg driver bug.
http://bugs.freedesktop.org/show_bug.cgi?id=15098

A workaround is mentioned here.
http://forums.freebsd.org/showthread.php?t=1186

Thank you Ben. That issues been bugging me for a while too.