Must have been a glitch - it loads fine for me now. And I think I pinpointed where/why I think the cat looks a bit odd. I also think that although the guy in your picture looks great per se, you're missing your friends likeness some, so I did one of my usual scribble-overs....
For the guy: you seem to have changed the bridge of his nose somewhat, and also the shape of his lips: he seems to have a thinner upper lip. Other than that, and this is probably more due to your style of drawing, really, he has a more rounded lower lip and shape of the eye than you have drawn.
For the cat: You've excluded the wee bit of chin that should be visible which made the ... er... nose cheeks?
look like they protruded more than they should (maybe because you wanted that pipe there). I think that line needs to be smoothed out a bit, and I would recommend moving the pipe to the left as it currently sits oddly in the cat's mouth. (Basically if someone has a pipe or cigarette at one end of their mouth it's usually "pointed away" from the mouth and not towards the other side of the mouth.) I also think you did the nose a bit big although most of it will probably look better when it's all paint and no linework. And finally I think the ears are a bit too sharp looking. The tips should be a little bit rounded.
Hope this is at least some use/help