Operating system and graphics card
Broken: 2.69 - 2.71
Short description of error
After some time of working using multiply times shortcut 'W' - specials in edit mode , then R to remove doubles, blender crashes. I did not notice anything 'logical' in this issue. Just after another use (dont know how many times you have to do it) of shortcut W the R blender crashes.
Exact steps for others to reproduce the error