Out of the camera, my D200 NEFs are displaying in the correct orientation: portrait orientation shots show up in portrait orientation.
I then apply a batch to these images in Capture NX2.
Back in PM5b3, the portrait shots are suddenly showing in landscape orientation, with a little rotation symbol to the top left of each thumbnail. Same in Preview for these images.
In PM4, these images show in the correct orientation, both before and after editing in NX2.