>I see an entry in "Recent Threads" on the hompage I would like to read. But I am not able to find the thread because you have to enter a forum in the search. I even tried every forum i subscribed, but no luck. The thread is obviously not in "my" fora.
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>Do I really have to subscribe all fora and search them one by one?

That would be the way to do it for now. However, in that section, I might add a forum name before the thread title so it would give an indication on where it is.