At least twice a day, I get the warning that the iTunes library can not be saved. Ok. In the past, all I had to do was close iTunes and restart the app. Now when I close iTunes after this happens and i Reopen it, I get the warning that the application can not be opened. The only way to reopen it is to reboot the computer. I'm getting so upset with this that often times, I'm just holding the power button to turn it off quickly instead of getting a stupid warning that mail prevented the computer from shutting down o some other app. This is on a 2010 MB running ML with all current update. This also happens on a 2008 black MB with SL and all updates. I've tried moving the .itl files from the external drive to the MBs internal drive and that does not help on either computer. The 2010 MB has a fresh install on ML and this still happened with all updates. There has got to be a fix for this, please help. iTunes is my main use for both of my computers.