Having similar issues with my 722 (not "k"), i.e, slow overall response to remotes, slow guide, intermittent pixelation and sound issues in recordings (but almost never live), issues with pausing and resuming live TV, etc. Pretty much all the issues I've seen described here for the 722k. I'm experiencing them all and have been for awhile. Currently firmware L722 as well (previous L721). Temp average 120, Lo 78, Hi 138. Removed cover from unit to assist cooling but doesn't seem to help. I have a USB fan coming to try as well. I also experience something else: When I try to archive recordings to my external USB target, some will go, some give me an error. I'm of the opinion I have a HDD on it's last legs. I've ordered a couple firmware recognized replacements to try before I get another rcvr. I own, don't lease. I'm just not convinced all my problems are software related. Anyone have any other thoughts?