I don't remember how I did it. But there is some sort of feature, that for some reason went and tested everything on my camera (60D). To get it to stop, I had to simply turn off the camera and turn back on. I was going through the ML menus, messing with the things I don't normally mess with. (I've mainly used the HDR bracketing and timelapse features). I wanted to see what other things there were. I'm wondering if you might have hit this as well?
Did it seem like your camera was cycling through every feature? Taking photos, and video, and wouldn't respond to anything other then turning the camera off?
As I said, I have it installed on my 60D and have had no issues.