Hi Trond, thank you for your post. Up until now it seemed I was the only one that raised this issue. I cant believe that people dont understand how SEO unfriendly duplicate content is.
Regarding joomla and duplicate content please visit
forum.joomla.org/index.php/topic,125365.0.html
I applied the patch mentioned in this post and was able to remove duplicate entries for an older Joomsef version (1.2.*), but with 1.3 and newer version it just doesnt work
Please, if you find a solution to this please let me know. Id really like to make it work because Joomsef is definitely the best SEF component for joomla out there, bu unfortunately unusable for serious SEOs at the moment.
Kind regards