Sync erased all my Apps

After months of successful syncing with my MacBook Pro, my 3G got the message that it was not an authorized device. The computer then erased all the Apps I had downloaded, along with any song I hadn't purchased from iTMS. I tried the "restore" function - no luck. Anyone? (iPhone is using 2.2, but I upgraded last month without problem.)

Hmm. Think I might have answered my own question- it looks as if iTunes did not sync the newest apps from my phone, and then erased them as they were not listed in the apps sync window. Hey ho. Will have to download them all again...

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