[MM3-users] Bottom line of message footer

Here's another question that I have. A regular message just came into my email from one of the lists I'm a member of and it had a 3 line footer. The first two lines are fine, they just include the list's email address and an address to send unsubscribe requests to. The third line is this:

%(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s

It looks to me like it should be a link to the group's list info page. Is this a bug or is there something I can do to fix it? It looks like it might be missing a forward slash after the first "s".