This, among others ...
http://www.comicsalliance.com/2009/06/30/the-craziest-costume-changes-in-comics/After Captain America's death, his replacement (one-time sidekick Bucky) ditched the original suit (designed by Jack Kirby as a modern take on a knight in shining armor) for a redesign by Alex Ross that bears a striking resemblance to the Puerto Rican flag.