I have installed your Domain Maping Plugin on my Wordpress MU, but I have some trouble with the URLs generated.
For example, I created in my network a new site called http://www.successitaly.it/formazioneimprenditori (www.successitaly.it is the primary domain where wordpress MU were installed) and mapped it to the domain http://www.formazioneimprenditori.it.
But, when I access to my wordpress MU and choose to work on the site http://www.successitaly.it/formazioneimprenditori, my browser’s URL remains (badly) in http://www.successitaly.it/formazioneimprenditori and don’t change in http://www.formazioneimprenditori.it. And all new pages create by wordpress on this website have (badly) permalink like this http://www.successitaly.it/formazioneimprenditori/new_page. This is not correct: the permalink should be http://www.formazioneimprenditori.it/new_page.
This trouble happens with every new site that I have created in my network. How I can fix it?