[TECK]

Thanks for the detailed info, Marco.
That should teach all how important is NOT to make backups using any tools other then mysqldump.

If you are not familiar with the procedure, do this:
Telnet into your server and run this command:
mysqldump --opt -u USERNAME -p DATABASENAME > /path/to/backup/folder/$date.sql

Restore your database with:
mysql -u USERNAME -p DATABASENAME < /path/to/backup/folder/070101.sql

Or you can set a daily cron job, for backup.sh (with contents like):
#!/bin/sh
date=`date -I`
mysqldump --opt --all-databases | bzip2 -c /var/backup/database-$date.sql.bz2

Personally, I do this and transfer every week all files from my server into my Windows PC, through Samba.
I'm really sorry about your problem, but look at it positivelly... you will never miss to make a backup from now on, the right way.

Also, this thread really proves one more time how unreliable are web backups.
I said it many times: Never do a backup through a web interface.
People who release backup hacks should warn the users that their tools have 99.99% chances to produce corrupted backups, no matter what's the size of the database.