Core 2 test 3 display problem

[mace]

Hi,

I have just installed core2 test 3.  The system defaults to 640x480 for 
the screen resolution.  I have tried changing it, reboot, and it stays 
at 640.  When I go back into display, it shows the changed in 
resolution.  Is this a bug or am I doing something wrong.  Under 
preferences for display it only shows 640x480.

I am running a tyan s2466 motherboard with dual mp2200+ 512 meg ram 
60gig hd, Ati 8500, 19" monitor. 

This makes the system almost unusable.

Thanks