I disabled the add-ons one by one and tested each one - the problem remained. All three were disabled and still the problem remains. But I booted into boot camp and at least was able to see the problem myself, so I can describe it more accurately. When you click on a forum, the Post thread button is there - the title box is there - but the conversation box is missing...and therein lies the problem. I can type in the title box, but because there is no conversation box, I cannot post anything, I am using the xenfracture style, but if I switch to the default, what is that going to do to my forum? I know, I know...I always set up a test site, but didn't do it this time. So what to do?