Everytime I play a vudu movie HDX it will play for awhile then just stop and hang. I then have to back out, quit VUDU then restart sometimes it will play the rest othertimes it will hang up again. This weekend it was so bad that I loaded up the PS3 and it played the HDX version perfectly with no stops. My internet is great and vudu says I can play hdx no problem.
BTW I had done a hard reset this weekend as well right before playing the movie.