A deleted file in the backup archive will not be recreated ?

When I do a backup ( local folder to local folder, any options ) and delete one of the archive files ( e.g. "duplicity-full.20091008T074524Z.vol2.difftar.gpg" ) another call of duplicity will add some files, but not the data that has been deleted before ( e.g. 25 MB are lost ). This leaves an incomplete backup folder which doesn`t seem right to me. After doing a backup with duplicity without it spitting out an error message the backup archive is expected to be sane / complete.

This problem may be related to this bug : https://bugs.launchpad.net/duplicity/+bug/425966