WebDAV functionality not working for Internet Explorer / Windows Network Places

I am using archiva built from source (r548493). I set up a managed repository and several proxied repositories.

Browsing the WebDAV url from Firefox works just fine, but it appears the IE doesn't recognize the url - it asks me if I want to "save this file", and its type is unknown.

When I try to set up a Network Place using the url, it shows me the top level of the repository, but if I try to browse to any folder, I get the error: "Documents in this folder are not available. The folder may have been moved or deleted, or network problems may be preventing a connection to the server. There is a problem with the web server. Please try again later or contact the server administrator."

I notice that the url it's trying to browse to is incorrect. The root URL of the repository is:

http://[host]/archiva/repository/internal/

but when I double-click on, say, commons-collections, it tries to browse to:

http://repository.muze.com/archiva/repository/commons-collections