2 site collections configured the same, one is a team site one a public site. In the team site I can expose lists from a sub site on a parent site page via a custom data view web part. The exact same technique doesn't work on the public site and throws the"list doesn't exist" error. The web part is configured correctly because it works if I insert it on a sub site page. It's not a permissions issue - the source list can be accessed anonymously on the sub site.
Any ideas?