http://bugs.winehq.org/show_bug.cgi?id=18533
--- Comment #1 from Henri Verbeet hverbeet@gmail.com 2009-06-04 01:29:57 --- This is not technically a regression, in that the commit does exactly what it's supposed to do. What you need to figure out is why the context is accessed after it is destroyed.
My guess would be that the "DestroyContext(This, This->pbufferContext);" in the ORM_PBUFFER case of FindContext() causes the render target readback at the end of FindContext() to use the now destroyed context. But then, I never touched the pbuffer code.