should we put new suggestions on Mantis
I do not think so. But of course Footkerchief is person to answer that.
I'm not, really. Personally I think the forum is a better environment for discussion, and that discussion is a really important part of suggestions. It's not my decision by any means, though.
Speaking of Mantis, I would suggest that duplicated reports or reports that are not bugs should be marked differently than "resolved" (green). I intepret resolving as "there was bug and it was fixed". This can be confusing in other cases.
They should be closed, not resolved.
Someone raised the same issue on the tracker. This is what I told them:
I'm setting them as "resolved" so that Toady can review them before closing them. As far as I can tell, that's the expected workflow for Mantis, so I'm trying it out. Also, when you resolve tickets, it gives you to the opportunity to also set a duplicate relationship, which is more convenient than doing it as two separate steps.
In addition to the fact that Mantis makes it easier to do things this way, here's a workflow diagram for general bug tracking:
I agree that "resolved" isn't the best word for duplicates, though. This is all still very experimental, so I may switch to closing them directly, depending on what works best for Toady.
e: Heard back from Toady -- we're going to stick with this method, at least for now.