Comment 3 for bug 67097

Awesome. This has totally boned my system now.
I'm stuck in "please use apt-get install -f" mode, but when I do, I get the popups.

Preparing to replace x11-common 7.0.0-0ubuntu45 (using .../x11-common_1%3a7.1.1ubuntu5_i386.deb) ...
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = "en_AU:en",
        LC_ALL = (unset),
        LANG = "en_AU.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_ALL to default locale: No such file or directory
Use of uninitialized value in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm line 104, <GEN1> line 4.
Use of uninitialized value in join or string at /usr/share/perl5/Debconf/DbDriver/Stack.pm line 104, <GEN1> line 9.
DESTROY created new reference to dead object ' Qt::VBoxLayout' during global destruction.
dpkg: error processing /var/cache/apt/archives/x11-common_1%3a7.1.1ubuntu5_i386.deb (--unpack):
 subprocess pre-installation script returned error exit status 255
Errors were encountered while processing:
 /var/cache/apt/archives/x11-common_1%3a7.1.1ubuntu5_i386.deb

Sigh. This is my production machine - serves me right for trying to help out with a release candidate, I guess.