Originally Posted by Plagman
Is there a wine bug item tracking this issue? Which World of Warcraft renderer is being used here, OpenGL or D3D?
There is currently not a wine bug because it goes away with an older driver, hence my thinking it's an nVidia issue.
It works fine with D3D rendering, this is just happening in OpenGL.
I use OpenGL as it's much faster for Warcraft and I'm a raider who needs the speed
EDIT: You only see the rectangle at certain angles, mainly face on if that helps any.