First I removed the 'set -e' from /var/lib/dpkg/info/firestarter.postrm so that the script wouldn't exit so quickly. After that 'dpkg --purge firestarter' completed without errors. Then I reinstalled firestarter and now it seems uninstalling works just fine. What a strange bug. :?
Allright, I did a bit more testing.
First I removed the 'set -e' from /var/lib/ dpkg/info/ firestarter. postrm so that the script wouldn't exit so quickly. After that 'dpkg --purge firestarter' completed without errors. Then I reinstalled firestarter and now it seems uninstalling works just fine. What a strange bug. :?