Radeon x1600 Pro Pci-e Black Screen on Boot

I have a Radeon x1600 Pro 512mb PCI Express x16. Everything during the
install of vista seems to work fine, however after the install's final reboot
(when its supposed to get you to create your windows username) all I see is a
black screen with the mouse cursor (which does seem to move - not frozen).
The only way I can get to a desktop is if I boot into safemode where I can
install the ATI Catalyst Vista drivers which seem to work. Once I restart the
computer from safe mode Windows seems to work correctly with Glass enabled
etc. However if I reboot again, I get the black screen. So it looks like if I
want glass I have to boot into safe mode and reinstall the ATI Vista drivers
before I can boot into regular mode.

I know that the Radeon Mobility x1600 has had some issues and only works
with the standard VGA display adapter driver (which obvisouly doesnt support
glass). Is it maybe because the Mobility and the PCI-E versions are built on
the same chipset?

Is anyone else having problems like this? Please let me know.