Weird online/offline issues plus DB error

[محروم.كوم]

We're experiencing some weird issues on one of my forums. Users are being shown as online in some areas and offline in others. I'm not sure if it's everybody or not* but one user at least - Chris - is shown as being online when I view "Who's Online". But in his posts* the online/offline indicator is OFFLINE* and his profile shows that he is OFFLINE and says his last visit was yesterday at 9:20 PM. This isn't true* as he is online right now (10:05 AM) and he has even made posts this morning.


He gets this Database Error when trying to log out: Quote:
Database error in vBulletin 3.8.4:

Invalid SQL:
UPDATE vb_user SET
lastactivity = 1253453069*
lastvisit = 1253454869
WHERE userid = 4;

MySQL Error : Incorrect key file for table './addict_forum/vb_user.MYI'; try to repair it
Error Number : 126
Request Date : Sunday* September 20th 2009 @ 0829 AM
Error Date : Sunday* September 20th 2009 @ 0829 AM
Script : http://www.adminaddict.net/forum/log...321161858a30a6
Referrer : http://www.adminaddict.net/forum/index.php
IP Address : 71.232.***.***
Username : Chris Martin
Classname : vB_Database
MySQL Version : 5.0.81-community-log

For other users* including myself* we can log out just fine and our online/offline status isn't malfunctioning like Chris' is. __DEFINE_LIKE_SHARE__