Windows 7 x64, FX 8350, GTX 590
Broken: (2.7 Release hash: 19e627c)
Worked: No problems with this before 2.7
Short description of error
Opening blender almost every time the user preferences shows up maximized and with graphicall glitches, if I close that window, blender works normally...
Exact steps for others to reproduce the error
Just open blender and it shows up...