startx shows black screen with cursor

[Jason Dravet]

I did a yum update to today's rawhide and now X no longer functions 
correctly.  I looked through the daily rawhide reports since my last update 
(Tuesday) and my guess is xorg-x11-server-1.1.1-44.fc6 is what broke.  X 
starts but no panel, icons, or background show up.  A black screen with a 
cursor is the only thing I can see.  The cursor and mouse work fine.  A 
ctrl-alt-backspace is the only way to shut x down.

I have a Number Nine Revolution IV video card and a SGI 1600sw monitor.  
Everything was working before the update.

Thanks,
Jason