After downgrading ia32-libs to 20090808ubuntu9 from https://launchpad.net/ubuntu/+source/ia32-libs/20090808ubuntu9/+buildjob/1996308 and then reinstalling flashplugin-installer, the problem goes away. So this is a regression with ia32-libs 20090808ubuntu10.
** Also affects: ia32-libs (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/745459 Title: package flashplugin-installer 10.2.153.1ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs