Okay thinking that rewrite rules may be the issue, my .htaccess was as per:
But the problem is still there.
I've checked through vbSEO to see if any rewrites are set in there, and none have been set.
Plus with vbSEO as per the earlier post I've modified the functions_vbseo.php file as per
here, to read:
instread of:
I did try changing the line:
as mentioned in the thread but that made the entire forum vanish!
So unless there is something I else I need to take out of the .htaccess file it looks like I can't find the cause of the rewrite issue.