Warning on initial backup unable to delete file

[Dan Poirier]

duplicity 0.6.14
Python 2.6.1
Mac OS X 10.6.8

Target filesystem local Mac file system

Command line:
rm -rf ~/.cache to
duplicity -v9 --no-encryption ./from file://`pwd`/to >dup.out 2>&1

Seeing these messages with default verbosity:
Unable to delete /Users/poirier/.cache/duplicity/02164a79c531c573207470764797d0af/duplicity-full-signatures.20110730T150346Z.sigtar.gz: [Errno 2] No such file or directory: '/Users/poirier/.cache/duplicity/02164a79c531c573207470764797d0af/duplicity-full-signatures.20110730T150346Z.sigtar.gz'
Writing /Users/poirier/tmp/to/duplicity-full.20110730T150346Z.manifest
Unable to delete /Users/poirier/.cache/duplicity/02164a79c531c573207470764797d0af/duplicity-full.20110730T150346Z.manifest: [Errno 2] No such file or directory: '/Users/poirier/.cache/duplicity/02164a79c531c573207470764797d0af/duplicity-full.20110730T150346Z.manifest'

Attaching full output.