netmeg - 5:55 pm on Apr 19, 2011 (gmt 0)
I changed a site from www to non-www last year, and it took about a month for everything to switch over - EXCEPT THE HOME PAGE. For some reason, Google in its infinite wisdom displayed the home page with www for four months. Despite the canonical tag, despite setting the preference in GWT, despite the 301 in .htaccess. It's now (finally) set correctly. The only thing I can guess is it's because of inbound links, but I do not know.