ok so heres the deal. i bought a 15" mbp (the $1999 version, no upgrades) on 8/14/09. my itunes has all my ripped CDs in apple lossless format. iTunes works fine, except when i try to close it. i can close it normally via menu --> exit or whatever, even apple+Q, force quit etc...it closes, but the immediately bounces back and minimizes itself. ( i cant shut down unless i hold the power button until it shuts off) the only thing i did that i noticed was i installed last.fm plugin for itunes..it started not shutting down..so i removed the plugin...didnt change, so i used appzapper to uninstall itunes, then reinstalled it. no change. any ideas?