OK, I'm noticing a few things about the milkfat in my stored milk. This is the milk I'm storing in my fridge's freezer (side by side, in the lowest drawer, in the back) that I rotated within 30-45 days of pumping.
1. The fat globules stick badly to the bottle, the inside of the teat, to everything plastic they contact. I store the milk in the pumping bottle in the fridge usually, but I have just left it out and pumped into room temperature. I always cool it down before freezing. It's not every bottle, so I'm not sure what is going on there. I can't fit the special teats on glass bottles; they leak really badly when I try.
2. There was several days' worth of thawed milk that had golden globules that very rapidly floated to the top of the milk. Like if it stood for 5 minutes, there they were. They did not readily blend when I swirled the milk. I've never seen anything like this. The milk looked OK while frozen. What I thawed this morning seems to be OK.
3. The latter milk smelled really gross after just a few hours. He drank it, but not readily. Can't be sure if that was because he wasn't that hungry or if it was because it tasted weird.
I haven't touched anything in the deep freeze, just this, so I'm not sure if it's related to being stored in a freezer versus a deep freeze.