PS3 and Xbox clients don't show those http errors, they just go back to the menus, which I've seen happened on the Xbox at least (hardly ever use my PS3 anymore)
Opposite for me; I sometimes have issues on the PS3 with Netflix (had it for 2 years now) but Apple TV 3 has zero issues so far. If you're considering returning your Apple TV for something like that, by all means
I've had this issue with my ATV2 a few times in the past. I usually back out and go back in and it works. A couple of times I had to wait it out, I think it is something on netflix servers.