vbuleltin error: /index.php.php[ARG:3 UNDEFINED] was not found on this server.
 

After logout out of vbulletin forum (4.2.1) i got:

/index.php.php[ARG:3 UNDEFINED] was not found on this server.

Please any idea how to fix? Thank you

Does the same thing happen with all you mods disabled?

Do you use a foreign language file? If so, is that language up to date?

thx,no it was not plugin issue.

Here is the fix:
http://www.vbulletin.com/forum/forum...-forum-php-php[arg-3-undefined]?p=3278149#post3278149

Search phrasses for: php{3}

and it finds something, then it should be:
not:
or similar

I hope i did it right, but after logout, it just goes to index. Im unsure why this bug happend.

It is due to a outdated language file as cellarius suggested.

From what I have read here, http://www.vbulletin.com/forum/forum...49#post3278149 that is the correct solution.