Lock screen (windows)? Fullscreen?
 

Evrytime I lock my user so others can't get onto my computer and do stuff, the entire graal program freezes when I login again and has a random error about some false tokken.

Multiple graal windows issue, DirectX fails to reinitialize when one of the two windows is put into fullscreen mode.

If you want a nice large picture of either of these, ask. I can replicate the incident a few hundred times real easy.