IP logging problem

[Albasoul]

My IP logging is not working anymore as it should. I receive this warning when I try to see all the IP-s for a specific user from the control panel:

Warning: Address is not a valid IPv4 or IPv6 address in /home/virtual/site*/fst/var/www/html/admin/user.php on line 1288

IP logging was working fine before, I disabled it for some time, and now that I reenabled it, it gives me that warning. I opened user.php to see what that line of code is:

echo "<li>$ip[ipaddress] (".gethostbyaddr($ip[ipaddress]).") ".makelinkcode("find more users for this ip","user.php?s=$session[sessionhash]&action=doips&ipaddress=$ip[ipaddress]")."</li>\n";

I am running:

VBulletin 2.26
PHP 4.2.2 with PHP Accelerator 1.3 installed

Could someone figure out the problem?

Thanks

[Floris]

If you check the database, what IP's are logged?
Maybe the logging give an error. Maybe it is the host's IPv6 stack that is bugging up .. I don't know for sure what it could be. Sorry.