Random redirects to site home??
 

I've been having a problem with random redirects from the forum to the domain home.

i.e. the forum is installed in /forum

I have a redirect in place that send http://www.modelpowerboat.com to http://www.modelpowerboat.com/forum

The problem happens in the forum and in the admincp and it seems to be totally random. I.e. I click on a thread link and it takes me to the site home instead. But if I try again it will take me to the thread. Or sometimes it will kick me to the site home several times in a row.

Even in the Admincp when I change a setting, sometimes I will get the site home page show up in the right pane.

It's real frustrating as I can't work out why it is doing it. I have disabled the plugin hook system but it still does it.

What can I do to troubleshoot this???