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The sub page (both versions). This other version you've just linked is also an issue. There are a number of posts out there about optimizing Joomla! Try this recent one on the YOUmoz blog: http://www.seomoz.org/ugc/seo-your-joomla-website-in-11-super-easy-steps.

That is what I though. However, is the on page optimization only valuable for long tail key phrases that are not requested very often ?