I just received my 921 and previously had a 721 which my dealer managed to sell for almost what I paid for it. First the 921 fired up fine and has had no lock ups a far cry from the 721. My problem is that the local channels will not map to the local number. I had the same issue when I first installed the 721 after several hours this was fixed on the 721 by support re-authorizing the receiver and programing and waiting almost 24 hours. However the advanced tech support guy last night says this is a known 921 issue (will be fixed next software) and re-authorizing will not fix it. Have any of you had this problem, is it in deed a global 921 issue. I still think re-authorizing will fix it. On a second note the remote will stop scrolling in the guide and if you push the button one at a time it will move one at a time but not scroll. It appears this may be a UHF range issue as next to the unit is does not do this and my 501 infrad remote does not have the issue. The problem occurs however at about 8 feet. All and all I am very pleased with the 921.