It's a mixture. :-P Sometimes bug reports internally get closed with a "It's already FIXED as I remember something, but I don't remember which exact internal release and don't have time to search for it in ChangeLogs or if a ticket for this existed to correctly mark it as a duplicate".
Hence sometimes things are a bit unclear, also because of Nokia's unclear branching policy - 3.* was PR1.1.1 as we all know now, but it took me a while to find out whether 3.* just included some "cherry-picked" patches, or if it was branched at some point from the internal "master" releases that will lead to a PR1.2 release etc.

Hope this helps a bit...