Comcast's new DVR sucks
The user experience for searching by title is vastly worse than it was before. On the old Microsoft software, I was provided with an alphabetically sorted list of shows on the right, and an onscreen (alphabetically sorted) keyboard on the left. I'd use the up/down/left/right/OK buttons to "type" a letter, and it would jump to shows starting with that letter. I could enter more letters to continue filtering the show title; eventually I'd have enough that I could easily locate it in the show list. On the new software, I'm presented with 5 boxes representing the first 5 characters of the show name - initially "AAAAA." To change a character, I use the left/right buttons to select the appropriate box, and the up/down buttons to scroll through the alphabet.
Remote controls aren't the greatest input device, but this really should be a solved problem. My cell phone and squeezebox both get it right: use T9 and the number keys. Now, instead of the suboptimal Microsoft choice of navigating a 2D keyboard to pick each letter, I'm stuck with the even worse solution of navigating along a 1-dimensional line for each character.
More brokenness about Comcast's DVR upgrade can be found here