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What is the best way to manage 404 errors for pages that are no longer on the server. For example, client deletes old site from server and replaces it with new site. Webmaster tools is reporting 100 +  404 errors form the old site.  I've blocked the 404 pages with robot.text. Requested removal in google webmaster tools. And created a custom 404 page - http://www.tvsphoto.com/missingurlexample Is there anything else I can do?

I started managing a fairly small site that consists of a home page, flash portfolio, and a wordpress blog. The home page ( main index ) is canonicalized as:  The wordpress blog is canonicalized as Does canonicalization need to be consistent across the site? Could the difference in canonicalization cause any ranking problems, and or indexing problems for the blog / entire site? Any thoughts are appreciated!