Aggiornamento bello corposo… mi raccomando: backup prima di tutto!! tra le altre cose risolve: an issue that might cause your system to logout unexpectedly a graphics distortion in Safari Top Sites Spotlight search results not showing Exchange contacts a problem that prevented authenticating as an administrative user issues when using NTFS and WebDAV file servers the reliability of menu extras an issue with the 4-finger swipe gesture an issue that causes Mail to quit unexpectedly when setting up an Exchange server Address Book becoming unresponsive when editing a problem adding images to contacts in Address Book an issue that prevented opening files downloaded from the Internet Safari plug-in reliability general reliability improvements for iWork, iLife, Aperture, Final Cut Studio, MobileMe, and iDisk an issue that caused data to be deleted when using a guest account