Thanks again Marco.
Yes my backups are complete (my forum is very new, the database is almost blank!):
"-- EOB - End of backup" this is at the end of my backups.
I already checked these topics many times. Unfortunately, I don't have access to SSH/Telnet.
I just asked my host to restore my database for me on my test forum. Hope it will work although I don't think the problem comes from phpmyadmin
Is there a way I can send you my database backup so that you try to restore it on a test server ? This way we could know if the problem comes from the backup itself (the way I save the database) or from the way I restore it.
Thanks a lot !
Thomas