LogMeIn Erratic Mouse
Mouse has been driving me crazy lately. I have a 2013 Macbook retina that I've loved until May 2014. The mouse has been returning to the last point of left click every second. This will drive the typical user crazy very quickly. :-)
The solution is to remove "LogMeIn". I used app zapper app by app until the problem disappeared. "LogMeIn" was the problem. Good luck and get rid of LogMeIn. It's gonna drive you crazy.