Thank you, Steven,
I think I have to explain further what I meant with my second point:
For the time being, hitting the up and down arrow in the Track Browser
does not update the layout window, i.e. the main panel,
or the other Track Browser columns (those to the right)!
I can highlight entries and jump by typing (cool!) but all of this has no consequence
on the main panel (or other Browser columns), which should update accordingly
to show what I have selected.
By the way,
the best thing would be if you could tab through the columns and then into the main panel.
And then shift-tab back again. (Like moving along a chain. Not a circle.)
It works like that in MediaMonkey and feels very natural and practical.