Moved {model}/{id} route further down th eline as it was capturing {model}/new, {model}/update_options and {model}/file routes.
This could be seen when trying to retrieve an image in the edit dialog as the image was never being served.
I believe this was introduced when the requirement that the {id} portion of the route be a digit was removed in commit 688f0c3d1aa73403ac9e47d2fbff716b7813ac33.