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What is the BEST approach: abbreviated citations or fully spelled out citations? For the purpose of ranking locally in google what is the best method of formatting citations? Would it be abbreviated or fully spelled out addresses. Southwest v.s. SW  v.s. Sw Avenue v.s. AVE vs. Ave

I have been searching and testing for hours but cannot find a solution. I am able to get a URL to display with out the file exntension. i.e domain.com/file instead of domain.com/file.php The problem is both versions of the URL above work, therefore a duplicate content issue. How can I force the URL with the file extension not to resolve and give a 404 error? Or just redirect to the non extension URL? IF it helps here is my code. Options +FollowSymLinks
RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.+)$ $1.php [L,QSA]

I recently changed the URL of a page and used a 301 redirect from old to new. I just realized I lost all my Facebook shares. Now it shows 0 on that page. What can I do to get back my count of shares? I cannot find any information.

Hello all. If I have 10 links on a menu linking to 10 different pages, and 10 links on the footer linking to the same pages, does PageRank get divided by 10 or 20?