for some reason my screensaver will not start unless i use hot corners. i have ran disk utility and restarted blah blah.... still nothing. its continuous as well as my bluetooth mouse loosing connection randomly. just my mouse. and it is my 3rd magic mouse! (well 2nd i returned one b/c im not rich ) anyone else have this problem? i never had an issue with lion. just mountain lion btw. thanks in advance for any helpful replies.