This has been posted about quite a bit before. nVidia apparently replaced the Render extension with some proprietary thingy that doesn't work with everything. I'm not sure why, since AFAIK Render was working just fine, but hey, whatever, I guess that's why I'm not on the driver team.
One workaround is to use a solid color background if you aren't already. Another is to downgrade to release 3123, since 3123 still used Render.
This may also be cleared up in the next release, but I don't think there's a definite release date.