The app-version added in the URL for static elements which is convenient is development mode to avoid browser caching.
We have a trouble in production when Tapestry is behind load-balancers.
One request can fail (error 404) if it arrives on a different server after a first request on another server.
This should be desactivated in production-mode to avoid such errors.
Or at least make an fixed default app-version when in this porduction-mode.