Resurrecting this thread to see if there have been any SL updates on this. I sent in a ticket and nothing new on a patch. I'm using an ATI Radeon HD 4600 (similar to another mentioned in this thread) and have uninstalled the default drivers and installed the most recent ATI drivers, with a reboot and still SL and Singularity viewers are saying drivers are out of date. Not sure where to go from here