If you use Username Markup HTML to colour your usernames, and you have upgraded to 366 or 367 then make sure you have closing html tags for any that you open. If you don't, then the latest clientscript files will interact with some browsers to seriously stall or kill them while trying to display a page with more than a few names - IE6 and IE7 are known to die, Firefox appears to be immune.
This is a known problem - the most obvious fix is to correct your closing tags to match the opening ones, an alternative is to edit one of the clientscript files (as posted on vb.com).
Quote:
Originally Posted by Kier
If you are having real problems with pages locking up in 3.6.6/3.6.7, open clientscript/vbulletin_global.js...