If you keep the 'down' button pressed in TV Guide it will scroll and rollover to the top when the cursor reaches the bottom, which makes it hard to quickly get to the bottom using the 'down' button. In contrast, in other lists the cursor stops at the bottom and requires another single press of the 'down' button to rollover.

h4. Additional Information
See discussion: http://forum.team-mediaportal.com/mediaportal-releases-315/tvguide-speedup-datamodel-changes-72398/index7.html#post538562