Support Forum

I can say that your site is throwing quite a large number of javascript errors...  in firefox...  and even more in IE...  in FF, they stop after initial page load... in IE they continue to occur...

facebook oauth stuff... twitter stuff...

FF:

TypeError: document.defaultView.getComputedStyle(...) is null
http://platform.twitter.com/wi.....itiques%2F
Line 258

IE:

SCRIPT5009: 'Object' is undefined
WpGEeSVPBys.js, line 27 character 61

the IE one is something to do with Facebook...

Also, it appears you are serving cached pages from w3 total cache... you cannot cache the forum page as its all dynamic data and the caching plugin will get it wrong...  for ALL types of caching you are using, you must visit the options page for that type and tell it to not cache the wp page the forum is on...

the caching issue certainly can cause js issues...