a second and less important feature would be if you add the possibility not to keep only the zoomfactor (Ctrl+/) when switching from one image to another, but also the position, this would be veeery helpful when comparing similar images on details.
heyho first: xnview became the imagebrowser of my choice, after acdsee turned more and more dumb... and btw lightroom is not a serious opponent: its way to slow and unhandy, plus its very limited on formats.
so. i'm still looking for a lossless (and fast) solution for my fotos providing metadata ...