PageRank 2 for MSN

Funny - Google is playing with PageRank for MSN.com, which now displays a PageRank 2 - sounds like a bug with the way Google handles canonical urls (main url for your site: if you have got mydomain.com for instance, you may want to redirect all http://mydomain.com requests to http://www.mydomain.com) -

This is what seems to happen here - http://msn.com has got a PR=8 and is probably considered as the canonical url (google bug?), whereas it is redirecting to www.msn.com.