I guess it's an obvious pattern for users, to try to
1) search for an answer in a particular sub-forum,
2) change the phrase to narrow down the search
3) and finally post a new thread in this sub-forum if no answer was found
Would it be possible do do it without clicking "back"? The "search" field disappears once it has been filled.
Also "post new thread" disappears then.

Also there is no option to search in particular Category
so i.e. If I'm not sure if some answer would be in "general discussion" or "multimedia" or "interface" for either C++ or Qt, I have to search each of them one by one