Maybe I'm just to blind to see it, but I'm badly missing the link "unread posts" (may have a different wording in English). In other phpBB-based forums I use there is such a link. I find this very useful because it makes catching up so much easier.

If I'm right and there is no such link here, is it because it's not supported by the forum software version, or was there some kind of decision not to include it? Anyway, if it's possible, I'd vote for having an "unread posts" link

It is called a bit different here.
Just above the: Board Index --> General Discussion --> Site Feedback and Support

There are 3 small texts, the one you want is the middle one.
Called: View unanswered posts

Thank you! I've just tried this, but I still see lots of threads. I did a "Mark forums read" in the Board index, and I would expect to see only threads with new postings since I marked the forums read. This still feels like I don't see the totally obvious - any idea?

of course you see loads of threads

"View unanswered posts" is a list of posts with no replies

"view new posts" shows you the posts that have replies since you last visited

That seems logical, thus not what I'm looking for.

OK, then this relates to my last login? That seems to be the case (approximately).

But what I've found incredibly useful with phpBB-based forums is "unread posts".
Since I usually have my machine switched on all day and have the forum open in one of the tabs, the above will still show me far to many threads which I've already taken notice of.

I hope I don't get on peoples nerves

But - the "view new posts" link does not really seem to work either. If I log out and back in, the result is as expected - an empty list. A little later (I guess it must be after the session has timed out, I reload the page and get authorized through my session cookie) I'm getting a long list again, including my last postings which for sure haven't changed since I last visited the 'new posts' page. This does not seem to be right.

As I'm using several forums based on phpBB which have the "view unread posts" feature - is there a chance to have it here, too?

just above board index you will see view unanswered posts it's in small print but you can't miss it