Did you delete the actual game data for the game though? I'm not talking about the corrupted data, but rather the file under the Game Data folder. If you're trying to get the update for Uncharted 3, make sure there are no files for Uncharted 3 in that folder. After that, then Rebuild Database and try again.

If you've already tried that, then waiting a few days is probably your only option. Never heard of rebuilding the database not fixing that problem before.