In the announcements subforum there is a post announcing the release of Wheezy, but no equivalent for Jessie. There was a announcement post for Jessie (I remember it) but apparently it is in some other subforum.
The most confusing is when you want to post about news related to new Debian releases/development. Should it go into 1) News and Announcements, 2) General, 3) Off-Topic, or 4) Debian Development. You would think that announcements of releases are not "development" but there are several announcements about point releases in development. You would think that "General" is for support, but if you look inside, you notice that this is not the reality. You would think that Off topic is not for posts about Debian but other stuff, but the moderators here have many times stated (and there is a sticky saying also) that non-Debian post are not to be posted on the forum at all, which then raises a question about the purpose of Off-topic.
It is clear that the categorization is unnecessarily unintuitive for posters and caters to no functional need. I don't think that anyone here uses the main page and the categories. But it was concluded in the discussion that even if so, this does not warrant change. So you are necrobumping not only in a historical sense, but also from a discussiony sort of perspective.
Personally I think this is a design flaw in phpBB. The categories should be displayed only upon request and not as the main entry point to the content. Furthermore, if they were "tags" or keywords, they would not be mutually exclusive and one could appoint a post to several at once.