So evidently this bug has been fixed in newer releases, although I did not find a bug report related to this upstream.
I solved this problem by downloading the tarball for version 1.4.8 from
http://cyberelk.net/tim/data/system-config-printer/ and extracting options.py to
/usr/share/system-config-printer/ . After doing so, system-config-printer seems
to be working normally again.
- Bug#797118: system-config-printer hangs after double-click... Jakobus Schürz
- Bug#797118: system-config-printer hangs after double-... Terry Watt