Happened to see Gerard's blog post on issues with Malayalam Wikipedia & Unicode upgrade to 5.1
http://ultimategerardm.blogspot.com/2010/12/malayalam-enigma.html While traffic to websites ( yes, including Wikipedia ) is primary driven by search traffic ,apparently this had a negative effect as shown by WM stats. As he explains, the problem is there needs to be canonical equivalence between the old and new Unicode .. This is a larger issue and it is time that the foundation has a stake on the Unicode consortium ( and search engines too ? ;) )..