I've some issues about duplicated urls with 3rd party extensions.
For example,
index.php?option=com_xxx&article=2&category_id=3&controller=article&Itemid=7
index.php?option=com_xxx&article=2&category_id=2&controller=article&Itemid=7
must be same sef url because, it don't look category_id. It looks "article" and finds it form db table and creates url. So, this 2 url must be same but Artio creates second one article-2.html
It's a feauture request,
"Record duplicated URL" option like sh404sef.
Thanks.