https://bugs.freedesktop.org/show_bug.cgi?id=79858
--- Comment #2 from smoki smoki00790@gmail.com ---
Cannot reproduce by maximizing this in current Debian Sid: kernel 3.14.5, mesa 10.1.4, blender 2.70, openbox, Radeon 8400 / r3.
But of course i can see those artifacts when resizing, but it got refreshed here does not stay :).
Area with those artifacts are black with LIBGL_ALWAYS_SOFTWARE=1 blender