You know how we always try to go to great lengths to cover up the propellers on our submarines (with varying degrees of success)? It appears that the Maritime Central Design Bureau for Russia isn't quite as worried about it with their newest diesel boats of the "Amur" class:
On the other hand, the picture they have of the stern of their newest boomer (bottom picture on this page) does have the screw covered. Makes me wonder if maybe that's a dummy prop on the diesel boat pictured above...