Sling networks has been throttling video bandwith for users with slightly older out of warranty slingboxes.
Same thing has been happening to me as well. I have a consistent 60 mb download and a 20 mb upload broadband connection and I still get stuttering and connection drop offs during NFL and MLB games, specifically during the end zone touchdown drives and late innings.
Everytime I refresh the page after the player crashes, Sling starts playing me internal tv commercials that are not even related to the broadcast.
Will most likely return this product to amazon and give them a 1 star review for declining quality of service.