Maintainers for libproxy are Debian GNOME Maintainers <pkg-gnome-maintainers@lists.alioth.debian.org>.
You may want to refer to the following individual bug pages: libproxy-cil-dev, libproxy-dev, libproxy-tools, libproxy0.4-cil, libproxy1-plugin-gsettings, libproxy1-plugin-kconfig, libproxy1-plugin-mozjs, libproxy1-plugin-networkmanager, libproxy1-plugin-webkit, libproxy1v5, python-libproxy, python3-libproxy.
You might like to refer to the libproxy package page, or to the Package Tracking System.
If you find a bug not listed here, please report it.