Ok, this issue seems to be fixed with 9.0.21.55.3ubuntu1 version: builds/installs/upgrades/removes fine.
-- request: flash-plugin-nonfree https://launchpad.net/bugs/72146 -- ubuntu-backports mailing list ubuntu-backports@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-backports
