These are in v0.4.4 RC1 during winter (All temperatures were compared with the same scenario in v0.4.3):
-I was in an outside fully enclosed area with a campfire at night, but it said my body temp was only 5 degrees instead of 15. I got the message that it would be dangerous to sleep, but didn't lose any health when I did. The next morning, the temperature was correctly at 15 degrees.
-I was in a cave at night with a door (to enclose the area) and wooden floors I'd built and 1 torch placed on the ground. It said that my body temperature was 0 degrees instead of 15. I got the message that it would be dangerous to sleep, but didn't lose any health when I did. The next morning, the temperature was still only 5 degrees instead of 15.
-I was in a cave around 3:30 PM with a door (to enclose the area) and wooden floors I'd built and 1 torch placed on the ground. It said that my body temperature was 10 degrees instead of 15. At 7:30 PM, the temperature went to 0. (It was always at 15 in v0.4.3.)
-Being outside at night in or out of range of a torch was the same in both versions.