I'm also having a similar problem with the H10 and HR10-250 DVR from DTV using a MX-3000 remote. I've exhausted Universal's tech support...they are out of ideas. You mention the IR/RF issue...I'm using an MRF-300 to control the equipment. Everything in the system works great, except for the two recievers. I'm getting intermittent functionality at best...sometimes they are completely dead to the world. I ruled out RF interference by switching the remote to IR output only and have the exact same problems. The number pad rarely inputs a digit and the navigation in the guide and menu is jumpy...one push of the up, down, or side button will move the cursor several positions. These are the only pieces of equipment that i have run into this problem with. I have adjusted the IR sensitivity on the MRF-300, the positioning of the emitters on the boxes, and repeat commands on the remote program....all have little to no effect. please help!