http://bugs.winehq.org/show_bug.cgi?id=15644
--- Comment #22 from H. Verbeet hverbeet@gmail.com 2008-10-19 15:31:40 --- Yeah, I only properly implemented RECT textures with GLSL. I wasn't sure if the GLSL extension string was strictly required, issue 15 of the ARB_texture_rectangle spec seems to imply it isn't. I'll clean it up and submit a patch in a couple of days.