The package in question is capplets-data. The bug was introduced starting in capplets-data 1:2.20.0-0ubuntu3.
If you have cache of capplets-data packages you can verify this.
$ cp /var/cache/apt/archives/capplets-data_1%3a2.20.0-0ubunt* . $ sudo dpkg -i ...-ubuntu1 test $ sudo dpkg -i ...-ubuntu2 test etc..
The package in question is capplets-data. The bug was introduced starting in capplets-data 1:2.20.0-0ubuntu3.
If you have cache of capplets-data packages you can verify this.
$ cp /var/cache/ apt/archives/ capplets- data_1% 3a2.20. 0-0ubunt* .
$ sudo dpkg -i ...-ubuntu1
test
$ sudo dpkg -i ...-ubuntu2
test
etc..