A couple of months ago I upgraded my iMac to Mountain Lion. The keyboard is doing weird things. Example: in Word, whenever I hit either parenthesis key, i.e., ( or ), a context menu (Copy, Paste, Paste Special, etc.) appears as if I had used the right mouse button. And sometimes when I hold down a key such as the hyphen for repetition, it stops after a few repetitions - or the the same context menu appears. Occasionally I am unable to key in a French accent. This is becoming very annoying. Any suggestions or help would be greatly appreciated. Thanks.