Operating system and graphics card
gentoo ~amd64 gtx660m (12gbRAM + 10gb swap)
Short description of error
Thia is don't double of https://developer.blender.org/T38360 , this is same, but another issue
When i delete a strip or undo blender lag (freeze on about a minnite), blender dont crash just freeze and than worked again.
Please fix this issue.