Joomla tags with some templates may cause duplicate content, which we all know is a problem for Google and other search engines. Here is an example.
The tags which show up with Artisteer templates under a content item generate an sef like this.
The sef generated by the Joomla tag menu link generates a link like this.
This is core router issue which we didn't have time to resolve at this writing. However, the quick fix is to use a .htaccess rule. Here it is.
RedirectMatch 301 ^/component/tags/tag/(.*)$ /tags/$1
What this does is look for urls with /component/tags/tag/ and rewrites it as /tags/.
This will resolve the duplicate content issue.
*To help Google find your TAGS, be sure to add a menu link somewhere, and be sure to install this TAG extension for xmap.
*A related issue is the menu tag items do not have unique titles. We are looking into that as well.