For example, is there a way to "accept an answer" other than by writing a "comment "?
Sure -- just click on the "check mark" next to the answer (top left).
]]>Another consideration is that to best get people's attention, you should phrase your questions as cleanly as possible and use the terminology people are most likely to recognize. The title of the question you ask about uses terminology that I have never heard before -- terminology which is used for concepts which I certainly have heard before -- and indeed I don't think I ever looked at that question until now. Henno Brandsma in his comments suggests an equivalent version which is much crisper. I suggest you check that this is actually equivalent to your question, and then edit the question so as to ask it Henno's way.
Then, if you wait a week or so and still get no answers...well, you have some real evidence at least that your question is an open problem. In this case, you might also want to specifically ask a few general topologists, since general topology has some expert representation on MO but not really the quality or quantity of such in some other areas, like number theory, algebraic geometry, or logic. I don't see how you can ever know for sure that a problem is open, you can only acquire various degrees of certitude.
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