"View Details" and Locations page shows 404?

When i add a location the map works fine, but when you click “view details” or the “view location” on the edit screen it goes to a 404.

The url is built correctly like http://example.com/locations/some-location, its just gets a 404 when trying to reach it.

Any ideas?

http://wordpress.org/extend/plugins/wp-map-markers/