Well, guess what? I completely uninstalled the ATI software with their included uninstall utility and reinstalled it all again. Now it works.
Seems to be AOK now.
btw, I found good tips in the driver heaven forum which pointed me to an omega driver set for ATI. I first tried that and it worked, then ininstalled it and put in the ATI stuff off their supplied disk. The Omega driver set works and is much faster to install.
Thanks for the input. Part of the learning curve, I guess.
