Hi,
I have a sony 40HX720 and it's connected with ethernet to router. Everything works perfect trackid, browsing, internet video etc but when I'm logging in my youtube account from the tv I can't have access to my playlists. I can log in with no problem, i can watch my favorites video but when I'm going MyAccount->Playlists all I get is Network Error and the only choices are cancel and refresh....
I've changed router, MTU, another ISP but still nothing... Please HELP!!! 
Thanks,
Chris