Pictures are too flat.
Did you resize them or were they like that originally?
How come that some are so blurred, e.g.
http://img187.imageshack.us/my.php?image=fffffffffffffffffffffwa2.jpg
http://img440.imageshack.us/my.php?image=pdvd015cp3.jpg
did you cut a part of the picture and enlarged it? If so, it is a bad thing