So I posted this in the wrong place originally.. my bad.
Honestly have no idea what to call this, I got two screenshots to show you:
http://imgur.com/a/iBVZc
The first one is in chrome from a while back, it would do this on any website at any random time but was fixed (I hope) by disabling hardware acceleration.
The second one is of the game League of Legends client, which uses HTML & Webkit.
My thought is that webkit is doing something strange with hardware acceleration, as on League of legends client you cannot disable it.
Just wanted to see if anyone knows what this is and how I can stop it
Been unable to keep producing the problem. nVidia drivers are updated.
System info: http://justpaste.it/i4gw