Late 2012 MacMini running Mountain Lion After leaving the computer idle (several hours) after the screen has gone to sleep and such. Sometimes (not always) when I press some keys to wake the computer, things get weird: First the keyboard gets "sticky". When I press a key, nothing happens, but when I HOLD a key in, it will rapid repeat that key after about a second. I thought this was odd behavior since that kind of "hold to repeat" behavior is common in PCs but doesn't seem to be the case in any recent Mac I've used. The mouse is totally unaffected and acts totally normal. -IF- the strange keyboard issue happens, many applications will get slow, crashy, refuse to quit, etc. If the issue doesn't happen, everything is fine. Rebooting sorts things out but it's rather annoying. NVRAM clear did not fix the issue. I'm at a loss as to what to try next. Hoping for input.