Hey Guys!
Thanks borninblood for having this problem - I've had 3 sites not working using a CMS me and a friend have built. Couldn't for the life of us work out where our code was wrong - it works fine on 2
website hosting hosted else where but not on my eukhost.
Anyway read this as I use phpBB and by chance the symptoms were very similar - made the same change to the .htaccess and its working
The fault was using x-standard WYSIWYG editor, anything in it at all and it kicked you to the home page on submit.
So thank you! What is this mod_security
Cheers
Lee
PS - If you cant find the .htaccess file its coz its hidden - you need to click the top tick box on the pop up as you open file manager to see it - I had the same problem finding it as you borninblood, knew I'd seen it somewhere.
Thanks all