Bug#600571: perl: Fails to complete unpack during installation

[Gilbert Sullivan]

I used aptitude to upgrade three Debian testing workstations this 
morning, and ran into this obviously related issue on just one of them:

terminal output during upgrade attempt:

------------------------------------8<--------------------------------------
Reading package fields... Done
Reading package status... Done
Retrieving bug reports... Done
Parsing Found/Fixed information... Done
serious bugs of perl (5.10.1-14 -> 5.10.1-15) <unfixed>
  #600571 - perl: Fails to complete unpack during installation
Summary:
  perl(1 bug)
Are you sure you want to install/upgrade the above packages? [Y/n/?/...]  n
****************************************************************************
****** Exit with an error by force in order to stop the installation. ******
****************************************************************************
E: Sub-process /usr/sbin/apt-listbugs apt || exit 10 returned an error 
code (10)
E: Failure running script /usr/sbin/apt-listbugs apt || exit 10
A package failed to install.  Trying to recover:
Press return to continue.
------------------------------------8<--------------------------------------

I didn't proceed with the upgrade and came here to look for reports. 
Sure enough, here it is.

Aptitude shows the other two workstations as having upgraded perl to 
5.10.1-15 without any issues.

Regards,
Gilbert