Solution
Please Install the Updated Packages.
Insight
An updated x11-driver-video-mga package is available that corrects a problem where an earlier version was used to update the mga driver version 1.47, instead of the proper 1.4.8 version.
Affected
x11-driver-video-mga on Mandriva Linux 2008.1,
Mandriva Linux 2008.1/X86_64