Ever get a sinking feeling in your stomach, like it's November 2008 all over again? Yes, just like when Sony Pictures blocked its films from Netflix on Demand for a then-fresh New Xbox Experience update, so too are the early adopters of the new Xbox Live Dashboard update seeing select films excluded from the joys of its group sharing "Movie Parties" mode. Our BFFs at Joystiq have done some preliminary testing on the issue, and it seems the common link is that all guilty videos hail from the Starz Play catalog. In other words, you can all but forget about watching Pineapple Express synchronized with your Xbox 360-toting friends and family thousands of miles away -- for now at least. With any luck, like the previous issue with Sony Pictures, this problem will eventually fix itself, and with any luck, it'll be smooth sailing by the time the Xbox Live Dashboard update is officially pushed out to the masses on August 11th. Video proof of the misdemeanor can be seen after the break.