Code review comment for lp:~gz/ubuntu/quantal/unity/apport_ppa_bug_tag_1029471

as told on IRC:

didrocks | mgz: well, we do wait to have the version as it's enabling use to know when a regression started
didrocks | mgz: so I would rather like if you stop invalid characters, that we fix those in the version marshmalling
didrocks | we are really using that versionning for distro