Dangit. I'm still on L662 but I was hoping L664 would have fixed this issue. Then I heard it didn't, so I was hoping L665 would fix it. Then I heard it didn't, so I was hoping L667 would fix it. Then I now hear it doesn't. What the heck how can they leave out fixing such an annoying and nearly crippling bug, as it makes browsing some menus extremely slow, mainly the program guide. I just keep telling everyone in all the topics I see about this about the fix I found but there are tons of people that don't know about this fix.
Ugh, could be worse I suppose. Pressing MENU - MENU - CANCEL - CANCEL is pretty quick and painless to fix it, but for those who don't know about the fix, I can see how frustrating this bug would be.
Other than that my 722k's are very reliable, especially compared to the U-verse DVR I previously owned. Though I would still say my old DISH DVR 625 was a tad more reliable than the 722k, however the lack of HD on the 625 just doesn't cut it for me.