For months my 622 would not lock on an OTA signal of 91 from one distant Digital (HD) tower, while the other one of comparable signal strength was always a solid lock. I was always able to get a lock on the "622 problem tower" with my HDTV tuner card in my PC and my external Samsung Digital STB box for my DLP set. I am 62 miles + or - from the towers, with vy high-gain UHF antenna and preamp on 50 ft. tower. The moment I got L4.03, the problem tower's signal strength went up to 100 percent (from 91) on the 622 and locks fine. So far, no dropouts. Although I am in the Dallas DMA for LIL, my OTA comes from S. Oklahoma. Has anyone else seen a similar improvement since they received L4.03? My queries to Dish contacts have not provided a satisfactory answer as to whether my problem could have been cured by L4.03. I have not had the "loss of OTA" that others report.