Thanks very much!
I am waiting for confirmation on this from my colleague. I just wanted to sure that there are no other sources of this behaviour. Github has been moving away from Services and towards Apps. We are using the Travis.org integration for Github which, as far as I can tell, is a Github service. Is it possible that the Travis service is denied access to (the release) parts of the Github API? I highly doubt this, but want to ask for future reference.
Thanks!