Also, there are no such issues on my local dev site and MHB's dev site. Firebug is showing me the following which accumulates even when the page is idle:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator at
webmaster@christianityhaven.com to inform them of the time this error occurred,
and the actions you performed just before this error.</p>
<p>More information about this error may be available
in the server error log.</p>
<p>Additionally, a 500 Internal Server Error
error was encountered while trying to use an ErrorDocument to handle the request.</p>
</body></html>
Fire vB_XHTML_Ready
vbullet...s?v=422 (line 11)
Fetch Cookie :: vbulletin_collapse = '
c_vbactivity_bars_post7
c_vbactivity_stats_post7
c_vbactivity_stats_post210
c_vbactivity_bars_post210
c_vbactivity_stats_post211
c_vbactivity_bars_post211
c_vbactivity_bars_post864
c_vbactivity_stats_post864
c_thanks_post864
c_thanks_post587
c_vbactivity_bars_post1600
c_vbactivity_stats_post1600
c_thanks_post1600
c_thanks_post7159
c_thanks_post7357
c_thanks_post7381
mgc_cb_evo_bbcodes
featuredlist
'