We have identified a bug in yesterday’s release and are working to correct the issue. In the meantime we have rolled-back the latest release so your future operations will not be affected. Once the bug is fixed we will notify you and re-release the code. We apologize for any inconvenience this may have caused.
Because of that the new versioning feature that we announced yesterday is not available until we push the release again.
--Patrick Chanezon, AdWords API evangelist
