We noticed this about 3 weeks ago, but the OK button on the remote no longer plays a recorded show. Instead you have to hit the play button (first world problem I know, but the OK has worked for years) Also, when you press the stop button, instead of going back to the DVR folder for the show it goes to live TV.
I see that the last update - 1.9.9 - for legacy systems was on ours, but not sure when that was installed. Was this something that changed in the last software release?