X stopped working after upgrade to Xorg-7.4

[John Hein]

Joseph Olatt wrote at 18:36 -0800 on Mar  1, 2009:
 > I'm currently running the vesa driver and sometimes the display
 > seems to be losing colors (like as though it is switching from 24-bit
 > color to 4-bit color)...
 > 
 > Don't worry about it for now. I'm not sure I understand what is going
 > on. I will try to understand what is going on...
 > 
 > Thanks for all your attempts.

I've seen palette issues like that with vesa on linux, too (like after
killing a gnome session, then gdm comes up using very few colors).