Old file after database repair

[ehabfouad22]

Hello!
A frequent database error due to corruption of (MY post) table requires a repair of the entire database, as repairing the (post) table alone through the (phpMyAdmin) page never works out.
After conducting the repair process via the webhosting control panel page, a message that says: (Old file. Allow to cancel repair) appears.
I keep repeating the process of repair again and again, and in most of the cases I find no solution but restoring the database to the last backup!
Any common reasons for that?
Many thanks

--------------- Added [DATE]1254082688[/DATE] at [TIME]1254082688[/TIME] ---------------

Note:
I noticed in more than one case that the occurance of such a problem is proceeded by a mal-posting of a topic or reply. In some cases, before the problem happens, I receive a message from one of my "trusted" users to fix a topic he recently added, and the problem begins when I try to open the link (topic) he sent to me as an administarive message on the admin e-mail.
Does that help?