Threads that I have posted a reply to, where my reply is the last entry in the thread, are showing as unread in my User CP and in the What's New view.

How can they be "unread" if my post is the last one?

Even if I click through to a thread where the last post is by me, then click the "What's New" link in the navigation (not the back button in the browser), the thread shows in bold as "unread" to me.

There seems to be an issue with cookies that recognize which threads I have read.

Any comments from the administrators would be welcome.