When using the open user channel command to directly tune to HBO on demand channel 1501 using RS-232 it will tune directly to the channel but will not display the on demand content choices, only a black screen and channel banner. When entering the channel digits manually it will tune the channel and display the content choices. I have also noticed different guide behavior when using RS-232 versus IR from the device remote. Has anyone else noticed this? Is there a workaround?