Maintainers for libchamplain are Debian GNOME Maintainers <pkg-gnome-maintainers@lists.alioth.debian.org>.
You may want to refer to the following individual bug pages: gir1.2-champlain-0.12, gir1.2-gtkchamplain-0.12, libchamplain-0.12-0, libchamplain-0.12-dev, libchamplain-doc, libchamplain-gtk-0.12-0, libchamplain-gtk-0.12-dev, libchamplain-gtk-doc.
You might like to refer to the libchamplain package page, or to the Package Tracking System.
If you find a bug not listed here, please report it.