I have just noticed that in Minecraft 1.8-1.8.2 render nametags slightly weird.
If you are in f5 mode looking at the front of your character, aka third person, and look up or down while near nametagged players/mobs, they will tilt in the opposite way. I think it is best if some of you Mojangsters tested it for yourself 😉
Dupe of MC-5404