Try this:
Login Required - vBulletin JIRA
or some reason go to first unread post no working on IE9 and Opera 11.50
when use Standard URLs
Enforce Canonical URL is set to Standart or Strict.
when Enforce Canonical URL option set to off - work as designed. Example (not working):
when click on 'go to first unread post'
URL look like this
http://www.forum.com/showthread.php?t=48178&p=1599607[SUP][/SUP]
missing anchor #1599607
working :
when Enforce Canonical URL option set to off URL look like this
http://www.forum.com/showthread.php?t=48178&p=1599607#post1599607[SUP][/SUP]
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Confirmed. When using Standard URLs and Enforce Canonical URLs is enabled, post anchors are being stripped from links (so for example also from the go to last post link).
It is related to 6101.
Basically when the page is being re-directed, its losing the anchor.
FF seems to be quite clever in that it remembers the anchor, and adds it back again after the redirect. IE and others are not so clever, and so they fail.
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Doesn't entirely explain why it works on some forums and not on others but give it a try.