Comment 7 for bug 108754

I've seen a similar problem, but in my case when going from Heron to Ibex:

gwern@craft:19252~>install ssmtp [ 3:33PM]
[sudo] password for gwern:
Reading package lists... Done
Building dependency tree
Reading state information... Done
ssmtp is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Setting up ssmtp (2.62-1ubuntu1) ...
export: 41: #: bad variable name
dpkg: error processing ssmtp (--configure):
 subprocess post-installation script returned error exit status 2
Errors were encountered while processing:
 ssmtp
E: Sub-process /usr/bin/dpkg returned an error code (1)