Well, I guess it looks okay in there. Nothing growing or dead that shouldn't be.
The parent hive (no queen, no feeding) is boiling over with bees in the two bottom boxes, but no new comb in the top box with the foundation, so I took Jeanne's suggestion and moved a couple of frames of brood and resources up there and put empty foundation on the edges of the middle box--where I expect they'll ignore it forever. There were about a dozen capped queen cells built out from the comb and several hanging from a bottom frame. I also think there's more nectar than there was even when I was feeding them--whole frames of it. That's where the sour odor is coming from, so I'm guessing fermented syrup or nectar/pollen that smells bad, much as goldenrod pollen is said to smell bad.
The split, with the queen, hadn't taken much syrup and hadn't drawn any comb in the new box of foundation, except a bunch of cross comb between the boxes, so I moved some frames around there too. There's a bit of an odor in that hive too. The queen is laying.
So fingers crossed that the parent hive makes a good queen.
Thanks!
Diane