Just got HBO and Starz added to my HD package. On Starz Edge and Starz Family I've had movies that occasionally go to black screen for just a second then reappear. The sound never goes, just the picture. So far on the few movies I've watched on HBO this has not happened and it has never happened on the regular channels. Contacted Dish Tech Support and they haven't heard of this before and suggested next time I notice it to try to rewind my DVR and see if the DVR picked it up. Anyone else had this problem?