bufferregion + FSAA + nvidia 28.++


I was using buffer region extension in one of my test apps. I was on 28.32 while developping it. Now updated to 29.42 and for some reason decided to turn FSAA on (2x).

Buffer region looks messed up and elements rendered with glDrawPixels on top of the region are a mess.

Swicthed back to 28.32 but the same problem is present.

Is this a bug or is there a conflict between these 2?
Also, I don’t know how to detect if FSAA is on in my app so that I can avoid using buffer region.