Users getting Forbidden message?

[DTB]

Hi,

We have just migrated our large boards over from vbulletin, sorted all permissions etc however some users seem to be getting the following error:

A user having the problem says it is intermittent sometimes he can post others he can't get on. I'm just trying to narrow it down to a fix as i know for a fact it isn't permissions issues...

 

[Paul B]

See this post: http://xenforo.com/community/threads/dont-have-access-to-index-php-error.42728/#post-460164

It could be related to mod_security.

 

[DTB]

Mod_security is a pain!

Thanks Brogan.