Bug#345251: tasksel fails on untrusted packages

[debian@good-with-numbers.com]

> Error informing the kernel about modifications to partition
> /dev/md/0p1 -- Invalid argument.  This means Linux won't know about
> any changes you made to /dev/md/0p1 until you reboot -- so you
> shouldn't mount it or use it in any way before rebooting.
> 
> ERROR!!!

The only messages that I'm seeing in syslog that remotely resemble
errors are:

kernel: program parted_devices is using a deprecated SCSI ioctl, please convert it to SG_IO
kernel: program parted_server is using a deprecated SCSI ioctl, please convert it to SG_IO

In /var/log/partman, I see:

/lib/partman/commit.d/30parted: IN: COMMIT =dev=md=0
parted_server: Read command: COMMIT
parted_server: command_commit()
parted_server: Opening outfifo
parted_server: OUT: Error
[...]