In the quest to simplify and improve Wikipedia's HTML code, the turn has come to footnotes. Here is a proposal that describes how the number of elements needed to represent footnotes can be halved:
http://www.princexml.com/howcome/2009/wikipedia/ref/
As far as I can tell, the proposed markup works in legacy browsers, too.
Cheers,
-h&kon Håkon Wium Lie CTO °þe®ª howcome@opera.com http://people.opera.com/howcome