**System Information**
Ubuntu 12.04.5 LTS -
Nvidia GeForce 6150SE/nForce 430
**Blender Version**
Broken: (Blender 2.76 testbuild 2#)
Worked: (Blender 2.75a)
**Short description of error**
When accessing Blender's internal filebrowser in order to select a material/texture, no thumbnail previews are displayed (only icons) even though "show thumbnails" is checked in prefs.
**Exact steps for others to reproduce the error**
Check Prefs>File>"Show Thumbnails" box. Select "Image or Movie" and "Open" (BI) or Add>Texture>Image Texture (Cycles).