I have a pair of Sidi Genius shoes that I bought in '95, and lightly used before putting them away 5 years ago. I just got back into cycling, and ordered nice new pedals (among other things) to spruce up the bike after pulling the cob webs off. When I got my new Look Keo carbon pedals yesterday, I took the old Look cleats off and tried installing the new KEO cleats. Turns out, after 13 years, the Sidi soles don't take the newer style Look cleats. D'oh!
So, I guess I have vintage shoes that are obsolete! Guess I have to order me some modern Sidi shoes after all!