http://bugs.winehq.org/show_bug.cgi?id=10483
--- Comment #3 from H. Verbeet hverbeet@gmail.com 2007-12-10 03:11:58 --- Unfortunately AA isn't really supported at the moment, and in combination with FBOs it actually breaks. I guess the problem is that when you force AA through the control panel the onscreen framebuffer becomes a multisample buffer while the offscreen buffer doesn't. Blitting between those probably causes the 0x502. To fix this we would probably need to use EXT_framebuffer_multisample, but unfortunately there are other issues that need to be fixed first before we can properly support AA in Wine.