I installed 11.12 drivers tonight and rebooted (though it didn't ask me to, weirdly) and the first thing I always do after new drivers is check dxdiag to see if they installed correctly. Dxdiag is telling me I have drivers from 11/9/2011.

If I check Catalyst Control Center, it tells me I have 11.12. Is this anything to be concerned about? I have never seen dxdiag not update before.

I do get a message from dxdiag saying something about "some of the system info is not available" but it has said this before and has had the correct new driver info.

I'm running win7, 32 bit.

Update: I am no longer getting the "system information not available" message but it's still telling me I have 2-month-old drivers.

Without knowing what you tried already:
-uninstall the drivers
-use driver cleaner
-reinstall

There are already 12.1 preview drivers, which come highly recommended. You could try those as new installs:
http://support.amd.com/us/kbarticles/Pages/Catalyst121Previewdriver.aspx

Thanks. I installed 12.1 and dxdiag reflects this.