ISA Internal Server Error

Note to self: ISA HTTP 500 internal server error messages with descriptions that run something like Target Principal Name is Incorrect are usually a result of the name on the certificate of the published server not matching the server's name. For instance, if you publish www.foo.com through ISA, but www.foo.com is configured with a server cert for www.foobar.com (or even www.foo.net), you'll get this error.