I'm trying to setup my Routes and enable an optional 'format' extension to specify whether the page should load as a standard HTML page or within a lightbox.

Following this <http://routes.groovie.org/setting_up.html#format-extensions>, I've come up with:

```
map.connect('/info/test{.format:lightbox}', controller='front', action='test')

class FrontController(BaseController):
    def test(self, format='html'):
        print format

```

This fails. My route gets screwed up and the URL appears as `/front/test` rather than `/info/test`. It's falling back to the `/{controller}/{action}`.

How do I allow for the format extension? :/