http://bugs.winehq.org/show_bug.cgi?id=6745
--- Comment #8 from Tobias Jakobi liquid.acid@gmx.net 2008-02-10 18:05:13 --- I assume that this is a task that requieres programming skills, right?
I can only provide a reference test of the OpenGL renderer on a native Windows setup. This should give us a first clue how wglDeleteContext should behave to replicate the Windows behaviour.