Jag läste denna information från
http://www.seomoz.org/articles/bg4.php
Citat:
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One very common place to look for this error is on a site's homepage - oftentimes, a website will have the same content on http://www.url.com, http://url.com and http://www.url.com/index.html. That separation alone can cause lost link value and severely damage rankings for the site's homepage. If you find many links outside the site pointing to both the non-www and the www version, it may be wise to use a 301 re-write rule to affect all pages at one so they point to the other.
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Uppstår detta endast om man inte är konsekvent med länkarna?
Eller är det något som man alltid måste fixa.