Sometimes webmasters focus on the silly things and forget obvious site structure problems. I've been combining hundreds of dead (dying) domains into a network. This adventure began Dec. 2011 with the migration of vB to XF and slowly linking in domains using WordPress multisite. (sidebar - lots of work to do still but finally came up with the "tagline" !) A major challenge was getting /community to not be duplicated for each domain. So www.domain1.com/community and www.domain3.com/community were showing in the search engines. Ugh. By May 2012, the new Panda update wiped out results and sites dove from #1 to bye bye G-love. This was actually okay because the sites were not being updated, aka: they sucked. Anyway - I've mostly ignored G, Bing, Y, and others because the sites were dead and it was time to focus on building things. After all - there is nothing like killing something "average" by advertising ... Today - I was feeling particularly curious and looked at G webmaster tools and laughed. The change from www.domain.com/community to community.domain.com is clear as .... but I didn't mark the change made in Dec 2012. Drats. My take away - keep notes.