Upgraded from UBB.classic 6.7.1 to UBB.threads 7.0.1 then 7.0.2.

We thought we lost one of the threads we were using as an informative sticky at the beginning of one of the forums. Clicking through each page of that forum and searching for that author did not reveal it (nor did a "Show User's Posts" - at least we didn't find it). But it wasn't important enough to worry about so we forgot about it.

Then I was reading the first post in that forum and clicked on "Next Topic". Lo and behold that thread was displayed. It was still a sticky but just not being listed in that forum. I unstickied it to see if that would get it listed in that forum. Nothing. So I restickied it and left it (and I can now find it by clicking "Next Topic" while in the first post of that forum).

Ideas?