For example http://www.idtgv.com/content/browseurl (but in fact any eZ website)
It's not completely a bug and not completely a feature...
In fact when an anonymous user goes on /content/browse, the latter should be rejected of course.
But in a clean way
Maybe should be interesting to test is a user is logged, and if not just show a clean eZ template error (that could be overridden)