We'll respond shortly.
If you are using AutoTagger, you may want to upgrade to the latest version. The following bug fixes were applied:
First, you can now define your stages as strings or symbols and auto-tagger will not fail (thanks to Chad Wooley for the bug report).
Next, when deploying from a branch auto_tagger uses real_revision, not the previous tag, to create the new tag thanks to Brian Takita.