had a look at the coding, its a bit of a mess in there, way to reliant on java and such crap. anyway it appears to be the facebook specific tags. on the very second line:
<html lang="en" xmlns:fb="http://www.facebook.com/2008/fbml">
removed
xmlns:fb="http://www.facebook.com/2008/fbml"
and it started working, also maybe worth mentioning (before removing facebook dependency) these two blocks of code were doing something when a link was clicked.
<div style="position: absolute; display: none; z-index: 9999;" jumpid="0178753001" id="pj_anonymous_element_1_wrap" class="ipbmenu_content pj0178753001"><h3 style="z-index: 10000;" class="bar">Jump to page</h3><p style="z-index: 10000;" class="ipsPad"><input style="z-index: 10000;" class="input_text" id="pj_anonymous_element_1_input" size="8" type="text"> <input style="z-index: 10000;" value="Go" class="input_submit add_folder" id="pj_anonymous_element_1_submit" type="submit"></p></div>
<div style="position: absolute; display: none; z-index: 9999;" jumpid="0178753001" id="pj_anonymous_element_2_wrap" class="ipbmenu_content pj0178753001"><h3 style="z-index: 10000;" class="bar">Jump to page</h3><p style="z-index: 10000;" class="ipsPad"><input style="z-index: 10000;" class="input_text" id="pj_anonymous_element_2_input" size="8" type="text"> <input style="z-index: 10000;" value="Go" class="input_submit add_folder" id="pj_anonymous_element_2_submit" type="submit"></p></div>
its as far as I can dive in, its an unholy mess in there.