There was a FULLTEXT index on a table in the psa database that cause the database conversion to InnoDB to fail on my system. I was able to drop the index and manually run the updgrade. However, I could not get qmail to run again. I finally used rsync from a backup server to recover a working system. DON'T TRY TO UPGRADE WITHOUT A FULL BACKUP THAT CAN PUT YOU BACK WHERE YOU WERE!