You are right, this is not a duplication of bug 172275, despite of being related with the same issue (some controls fields are missing from the archive index), the partner-archive could be fixed easily, switching index generation to use apt-ftparchive, we can't do that for PPAs.
A proper fix is coming soon, but meanwhile, avoid the fields mentioned in bug 172308 if you can.
Mario,
You are right, this is not a duplication of bug 172275, despite of being related with the same issue (some controls fields are missing from the archive index), the partner-archive could be fixed easily, switching index generation to use apt-ftparchive, we can't do that for PPAs.
A proper fix is coming soon, but meanwhile, avoid the fields mentioned in bug 172308 if you can.