It's a very beatiful image! Very classical looking too. I agree about something being wrong with her face though and I suspected a couple of things, so I did a paintover thingy to test it. I *think* I was right, but you judge for yourself. What I did was lower her left eye (our right) and then paint her eyebrow slighty closer to her nose (when I moved the eye, it ended up too far away). I also strengthened her chin slightly, also on the right (her left :P) side. Does it look more like what you were aiming for?
(Edit: I did not fix the bridge of her nose, but it does look a little awkward now since I just copied the eye and pasted it on a new layer and then painted/blurred on top of that)
(Edit2 - besides spelling - maybe I should mention I drew perspective lines through the eyes and through the mouth to check what might be off. They should be parallell or slightly converging, so that's what I went by when I moved the eye...)