I, and many others, are having the same problem. There must be something wrong with the feed, because there have been been no Windows updates during that period. On one of my PC's (Vista 64) it stopped working about 5 days ago, but on another PC (Win7 32 bit) it continues to work!?
I have reported it to Sky News, but they don't seem interested. However, there is no clear help link on the Sky News website.