I'm posting this for other newbies because it took me ages to work this out. Please correct me if I'm wrong.
In order to make RPC services work (such as settitle or dynamic-height) you must copy the file javascript/container/rpc_relay.html from its current location to the domain on which your container is running. For example if you have shindig running on gadgets.example.com and your container is on www.example.com then you need to copy it to somewhere under www.example.com. Then you need to set the path to the new location in your container config file (either config/container.js or your local copy). The host name is automatically set in gadgets.js so you probably won't have to explicitly set it (though it doesn't detect https so if your container is on a secure page you'll need to use gadgets.container.setParentUrl() to tell it). It would be helpful if this could be included in a comment in rpc_relay.html itself. Tamlyn.

