Ah, OK. So there must still be a driver conflict or something of that nature on Puma w/ the ATI cards. Cheetah, with the 2 CUDA cards is pulling WUs fine now, after I updated the nVidia driver like Al suggested. Guess it's time to put on the nerd hat and see what's up with the ATI rig...
![nerd](images/smilies/yahoo/26.gif)
Something is definitely weird though, because it appeared to uninstall 12.3 Catalyst drivers just fine...rebooted, and then installed 12.4...rebooted again, and then checked it - still says 12.3 Catalyst for some strange reason.
![Confused](images/smilies/confused.png)