Seriously, WTF is TestService? (GS3 Crash)

It seems to be popping up more and more, where before it was only with copy/pasting (or attempting to, anyway) but now it happened as I tried to change wallpapers.

Anyone know the cause and/or how to fix?

P.S., did it happen with the last update that brought the brightness option to the Notification/Settings Tray? Didn't notice it prior.