i'm quite stumped by this problem lately. Bascially, i was editing some holiday shots and there were some full body shots dat are in landscape format.
I'm not sure whether it's just a visual illusion but after rotating the canvas to a portrait format, the face will appear squashed a little. Like it's "fatter" den it was when it was in landscape format.
I did not special settings, just rotated the canvas. What gives?