But, hm, in Fire and Water - did it suck the wreath during Daniels' funeral?

It did, sort of. Jack and Sam placed it on the Event Horizon and then it just sort of sank in from there after they took their hands away. But we didn't get the from-the-side POV that would show us the de-materializing aspect of things.

No problem on the spoilers. I seemed to remember that you were unspoiled.