I am experiencing very significant responsiveness issues with my HR23 when I try to Page Up / Page Down the Playlist, especially when I click to "expand" a folder with multiple entries. I have an external eSATA 1TB drive attached to the HR23 and have lots of kids programs recorded (50 - 70 in two or three folders). Is this a know deficiency/issue with DirecTV HD DVRs? Same problem exists when trying to DELETE programs.