Fender-mounted mirrors

[svgkm@halley.ca.essd.northgrum.com]

I was wondering - what are the relative advantages/disadvantages of the 
fender-mounted
mirror configuration found on Japanese cars vis á vis door-mounted? I remember 
reading in
a list posting (I think...) that Japan requires the mirrors to be placed so 
that they are
visible thru the windshield and that's why they are out there on the fenders. 
Anyone with
experience of both configurations who can offer an opinion?

Just curious...

Gary McCormick
San José, CA