Well, after literally hours of getting nowhere with DirecTV and having them send out a service tech (who replaced my triple-LNB+multiswitch) to no avail, I have finally found what is going on. If someone at DirecTV can get this to an engineer, I'd be thankful. To summarize the problem: Following the upgrade to some Series 2 DTiVos from 3.1.1c to 3.1.1d, the odd transponders would not function on one of the inputs. On mine, it was #1, on many people's it was #2. The problem is the same. Sometimes switching cables will solve or temporarily solve the problem. However, most people have not had success with this, including me. Here's what I believe the problem to be, and a workaround until D* figures out they created the problem with the software upgrade: The 3.1.1d rev of the software changed the "cobra" driver and removed an option "gHighPowerLnb" from the internals (this forum won't let me post the name of the other one, so you'll need to do a Google search to find where I saw this). In addition, I have built a signal attenuator (see below) that reduces the signal level on the input that cannot address the odd transponders that has worked. It looks to me like they now assume that ALL multiswitches and/or LNBs are "high power" and have increased the signal level. This excessive signal from the DTiVo to the LNB/multiswitch causes it to overload and not function properly. The solution is for D* to admit there's a bug, put the fire under the rears of their engineers to repair the driver, and get a fix out to their customers pronto. My experiences with them in the past week doesn't give me much confidence in this, but I can only hope... Anybody remember this fron D* in 2004? The FIOS Pixelation is very similar. I'll bet it is a software issue and it needs to be fixed in the next software release. the temporary fix was signal attenuation. I guess TIVO is a quality software house.