I had a few problems earlier, before the update, that didn't go away with it. One was in Mail where I lost the Spelling feature. Later noticed it also had disappeared in Pages and TextEdit. Apple said Erase the drive. I had a partition so I copied my entire Volume to the other volume and did the optional "Erase & Restore (?) choice after loading the original OS Disk. Worked perfectly. Did Software update. Worked perfectly. No changes to my work spaces, files, or settings that I can see except I now have Spelling back everywhere. Worked perfectly. You may have to do the same. Don't know for sure. Regards, Winston www.inventure.ca