**System Information**
Operating system and graphics card - win 7 64bit - Nvidea Gtx 860m
**Blender Version**
Broken: (example: 2.69.7 4b206af, see splash screen) blender-2.74-55b7a8c-win64
Worked: (optional) The last build failed as well but the official release worked before that
**Short description of error** If you double click on the property editor material name nothing happens !!
**Exact steps for others to reproduce the error**
Based on a (as simple as possible) attached .blend file with minimum amount of steps
To rename the materials I usually double click within the materials property tab , and then the name space is highlighted , at the moment nothing happens.