The screenshot URLS from the summary are not accessible now, but the
description matches what I'm seeing.
I have a laptop with RS690M (X1200) video and gnome-shell has flickering
triangles everywhere.  The application windows are ok,  Logging out which
restarts the X server usually fixes the problem.  This is with Fedora 20.  I
tested with a Fedora 19 live system and there was no problem.  I will attach
new screenshots.