I'm in australia and cortana seems to be working fine for me, but i have not changed regions back to australia then to US again. What kind of bugginess are you getting?
I dont believe it does (well i couldn't find it anyway), but that doesn't bother me, i would just watch it on the website if i really wanted to watch something i've missed.
No worries, just wanted to make sure you knew about the problem :)
EDIT: Also found these information logs relating to it, not sure if you want them or not but i'll post them anyway.
I tried using the PC application on my Windows 7 Ultimate 64-bit PC and it just crashes as soon as it opens with the "VoiceWakeServer has stopped working" error.