I had the same thing happen with a batch of Koelsch. No dry hopping, obviously. The mysterious floaties stayed at the top and didn't make themselves known until I was close to finishing the keg. Nonetheless, the flavor of the beer was great overall and exactly what I expected. I still have no clue as to what the floaties were or how they got there. I didn't do anything differently with tat batch than I'd done with my other.
--
th Cap'n in Portland, Oregon