Just had this happen to me. Parts have become corrupt, even the backup is corrupt. Last thing I did was rename the files using SWX Explorer. SP3. Windows2003 with the latest. No viruses. I've lost the work, am hating life right now. Backup also doesn't open. Only clue may be that it was renaming over the network... Any advice? I've sent the file already to my VAR to try to fix.