**System Information**
Windows 8, gtx770 driver version 340.52
**Blender Version**
Broken: 2.72.3 d7e4944{F133166}
Worked: 2.72b 9e963ae
**Short description of error**
Viewing a normalmap in the viewport in GLSL mode gives weird colours in the UI
**Exact steps for others to reproduce the error**
Create a plane, give it uv map and material, texture and normal map. Change display to GLSL and viewport shading to material.{F133164}