I've been playing around with my site map changing nodes and links to get a feel for how the different options may suit me. So far it seems to work quite nicely... until I hit this problem.
If I add any nodes to my sitemap, apart from the root, it gives me the error: An item with same key has already been added.
I'm not sure if this is a reference to the nodes themselves, or some kind of data-caching. When I clean my solution it tells me that the application cannot be found (highlighting the inheritance declaration in global.asax).
Hopefully someone can give me a nudge in the right direction. But if i resolve the problem myself I'll report back with how I did it.
Thanks again for this great tool.