I think I've done this all right, someone correct me if I haven't.
Screen Wipes now work as they did in 2.0.x.
OpenGL skyboxes. Slight change to sky vertical offsetting.
MD2's can be translucent again. MD2's can use sprites instead of another random texture if they have no texture. Patches are drawn in the correct place on non aspect correct resolutions. Cropped Patches are drawn.