To upload a package correctly, do the following:

* Ensure that your build environment is set up correctly to avoid .svn
  directories to be included in your uploads.
  The following settings in your configuration should do this (assuming
  'debuild' is used to build the package):
  - ~/.bashrc:
    export DH_ALWAYS_EXCLUDE=CVS:.svn
  - ~/.devscripts:
    DEBUILD_DPKG_BUILDPACKAGE_OPTS="-i -I"
    DEBUILD_PRESERVE_ENVVARS=DH_ALWAYS_EXCLUDE
    # You may also want to add this setting if you work on D-I components
    # for which you're not an uploader.
    DEBCHANGE_AUTO_NMU=no

* Update from Subversion:
  svn up

* Check that you don't have any uncommitted changes or files that do not
  belong in the package:
  svn st

* Update the translator info in debian/changelog by copying and pasting
  the output (if any) of the following command:
  scripts/l10n/output-l10n-changes -d .
  Take care that you preserve the UTF-8 encoding of the changes!

* Change the distribution to unstable:
  dch -r

* Build:
  debuild

* Check the resulting package:
  debc, debdiff, etc.

* Commit and tag the release:
  debcommit --release
