Hi José,
the AUTHORS file and some About.py mention a copyright of Karderio, who is not in debian/copyright. Can you please add him?
Further can you please take care of the following small issues:
P: glipper: experimental-to-unstable-without-comment
I: glipper: package-contains-empty-directory usr/share/help/C/glipper/figures/
I: glipper: package-contains-empty-directory usr/share/help/de/glipper/figures/
I: glipper: package-contains-empty-directory usr/share/help/fr/glipper/figures/
I: glipper: package-contains-empty-directory usr/share/help/it/glipper/figures/
If you still need a sponsor, I would upload that package afterwards.
Thorsten