Update to UI Slowness: The UI slowness is not related to the "scrolling effects" being on or off. I tested on both the HR23 and HR20 and scrolling effect being on or off had no change in the slowness on the HR23 for many of the UI slowness issues described in earlier posts. NOTE: The "scrolling of text" on the "Info Screen" (if more than one page of text is available and you scroll down) is affected significantly by the scrolling effects being on or off. When effects are on, the screen is VERY SLOW. It is a bit worse on the HR23 than the HR20, but in general both are affected adversly with the feature turned on.