System Information
Win7/64, AMD HD 6850 (Catalyst 14.4)
Blender Version
Broken: since blender-2.70-c6d8540-win64 (April 2nd), including blender-2.70-be980b9-win64
Worked: blender-2.70-f5b79df-win64 (March 30st)
Short description of error
see title
Exact steps for others to reproduce the error
Open
I've removed as much as possible from the file, but I don't know why it still happens in this case. Though, in any other case, Matcap shading is not a problem.