[andla]

Jag läste denna information från http://www.seomoz.org/articles/bg4.php

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.

Uppstår detta endast om man inte är konsekvent med länkarna?
Eller är det något som man alltid måste fixa.