Subversion import breaks with Mercurial

The following error happens when trying to import chronolapse from Google Code:

14:03:43 transaction abort!
14:03:43 rollback completed
14:03:43 abort: pretxncommit hook is invalid (import of "libbucket.hooks" failed)
14:03:43 Unable to convert svn checkout to hg

There are many questions I have after looking into bb/forms.py and bb/models.py.

1. For imports that are successful (on staging, for instance) the path is:

14:04:39 A sfarley/chronolapse3

1. For imports that fail, we have the path:

14:03:40 A data/c01/n03/s/vs0001/staging/d-808/r-747808

Why are they different?

1. It doesn't seem that we're using REPO_IMPORT_BASE_DIR at all in the import process?
2. Why do we have in /etc/mercurial/hgrc different settings for import?
3. Why can't we always run libbucket.hooks?