Daniel, Does that apply to GAE as well?
The docs say that google-oauth-java-client is built on google-http-java-client, and that the Apache http library does not work on GAE:
Do not try ApacheHttpTransport because it will definitely fail on Google App Engine.
If you do have Apache Http Client bundled into google-oauth-java-client on GAE, that would be great (lots of libraries depend on it and I didn't think they could be used on GAE). I agree with Andrew though: it would be nice though if you could upgrade at some point to a newer version for greater compatibility with other libraries.
Alex.