(In reply to comment #9) > I'm not really sure what's happening here, but I don't think these closed > source games are good enough tests cases to diagnose the problem. Could you > try to find a very simple Open Source mono program that will reproduce this > bug? It seems i'm able to reproduce the problem with opentk opengl examples: http://www.opentk.com/ http://sourceforge.net/projects/opentk/