Trouble in uploading bzip2 upstream tarball

[Rafael Laboissiere <rafael@debian.org>]

The Debian Installer is refusing my upload by saying:

==========================================================================
Rejected: aspell6.pt_20071212.0-2.dsc: incompatible 'Format' version produced by a broken version of dpkg-dev 1.9.1{3,4}.
Rejected: aspell6.pt_20071212.0-2.dsc: aspell6.pt_20071212.0.orig.tar.bz2 in Files field not recognised as source.
Rejected: aspell6.pt_20071212.0-2.dsc: no .tar.gz or .orig.tar.gz in 'Files' field.
Rejected: 'dpkg-source -x' failed for aspell6.pt_20071212.0-2.dsc [return code: 512].
 [dpkg-source output:] gpg: Signature made Sun 16 Dec 2007 08:27:15 PM UTC using DSA key ID 4A5D72FE
 [dpkg-source output:] gpg: Can't check signature: public key not found
 [dpkg-source output:] dpkg-source: failure: cannot read ./aspell6.pt_20071212.0.orig.tar.bz2: No such file or directory
==========================================================================

What should I do to fix this?  The .dsc file reads:

==========================================================================
Format: 2.0
Source: aspell6.pt
Binary: aspell-pt-pt
Architecture: all
Version: 20071212.0-2
Maintainer: Rafael Laboissiere <rafael@debian.org>
Homepage: http://natura.di.uminho.pt/wiki/index.cgi?Aspell
Standards-Version: 3.7.3
Vcs-Browser: http://svn.debian.org/wsvn/private/rafael/deb-pkg/aspell6.pt/
Vcs-Svn: svn://svn.debian.org/svn/private/rafael/deb-pkg/aspell6.pt/
Build-Depends: cdbs, debhelper (>= 5)
Build-Depends-Indep: dictionaries-common-dev (>= 0.70)
Files:
 0f76f5eead1f14e087c1224a7a18f732 92065 aspell6.pt_20071212.0.orig.tar.bz2
 375c012f60078e5754966521e3569688 3252 aspell6.pt_20071212.0-2.diff.gz
========================================================================== 

and the .changes file:

==========================================================================
Format: 1.7
Date: Sun, 16 Dec 2007 21:17:37 +0100
Source: aspell6.pt
Binary: aspell-pt-pt
Architecture: source all
Version: 20071212.0-2
Distribution: unstable
Urgency: low
Maintainer: Rafael Laboissiere <rafael@debian.org>
Changed-By: Rafael Laboissiere <rafael@debian.org>
Description:
 aspell-pt-pt - European Portuguese dictionary for GNU Aspell
Changes:
 aspell6.pt (20071212.0-2) unstable; urgency=low
 .
   * debian/control: Pre-depends on dpkg >= 1.10.24, otherwise the Debian
     Installer will refuse to install the package in unstable
Files:
 fd3721cc25c8080ebf0748b91880d643 855 text optional aspell6.pt_20071212.0-2.dsc
 0f76f5eead1f14e087c1224a7a18f732 92065 text optional aspell6.pt_20071212.0.orig.tar.bz2
 375c012f60078e5754966521e3569688 3252 text optional aspell6.pt_20071212.0-2.diff.gz
 1fad8458817c257c907adb010e825187 106668 text optional aspell-pt-pt_20071212.0-2_all.deb
==========================================================================

Thanks,

-- 
Rafael