Is there any way walls that don't go to ceiling are load bearing?
The beam at the top of the picture is almost certainly structural - it appears to be the bottom of a ridge beam for the cathedral ceiling that has had trim applied to it. The only other way to keep a cathedral ceiling from pancaking and thrusting the walls out is run perpendicular ties between the walls.

As for the wall, there is no way that this is structural at any point underneath the transom (the area at the top where it is open between the two rooms). There's simply nothing there for it to be bearing a load for.