I just upgraded to sv pro. I created a gallery which worked fine. I then embedded it in a page via dreamweaver. It works fine in Dreamweaver but all browsers now say they can't find gallery.xml. I've read your troubleshooting points and as far as I know the path is correct. I've uploaded it and the page can be seen at http://prismatik.com/dennislien/sculpture.html.
I hope you can help!! :o