Why are these beers freezing? Is it a malfunction of the freezer/temp controller? I'm switching from a fridge to a chest freezer and now I'm nervous my beer will freeze some random time...Maybe it's from the keg sitting against the freezer wall? The freezer walls get pretty cold, I could see them partially freezing a keg, maybe.
I wouldn't worry about this. I used to keep my keezer at 33*F with no issues. (Before I had Spiegelau glasses.) Now it's at 38*F and still no problems.
I also keep my lagering chamber at 1*C. Chest freezer. No freezing issues.