"Completely agree. If you think you buy a Beo4 1710, enable "navigation button" in your BV7s remote menu, and now you can control all navigation- and enter functions with the the new (joystick)- center button, you are ..... wrong!".
I think thats because you have to update your puc/stb list...
Solvede the problem for me whith my Beovision 8 40´
Shaun