When you right click the image, select Convert and Resize -
resolution 1920x1200 from a drop-down menu, wrong
resolution is written to the field below - 120 instead of 1200

Then picture
resolution after resize is 160x120 instead of 1920x1200.
Another minor issue (perhaps not a bug?) - mouse wheel to change
resolution doesn't work - it works good for Output format.
XnView v1.96, Windows Vista SP1.