You see this problem in the APUG gallery ALOT today. Several photographers made a great photograph in the past, and now their work is all somewhat derived from that one image. Even though they might be creating more good images, they are not learning or seeing anything new. Some people might say they are being "consistant", but I feel many have become stagnate and stuck in a rut with their way of seeing. This can be VERY hard for some photographers to break.
I don't upload images myself, but I would be guilty in this. Everyone is allowed a style instead of a mishmash of ideas which can't identify an artist.