Weird colors, glitching, screen trating and flickering is all symptoms on upcoming GPU failure. I think its just some software that triggers the hardware errors
All my glitches have been on login when the system loads the color profile i made with a colorimeter, after i changed back to original color profile i havent seen it yet. And the colorprofile have link to the gpu
AND for me it seems its the intel 530 gpu that is the problem. Which explaind why all 3 different AMD configs get these
You might be on to something because your right it's pretty diverse across all setups. My ntMBP 13" does it however I just downloaded the patch that Hair Force One mentioned and so far so good.