mythserver:/usr/src# dpkg --install mythtv-common_0.18.1-4_all.deb 
(Reading database ... 47865 files and directories currently installed.)
Preparing to replace mythtv-common 0.18.1-4 (using mythtv-common_0.18.1-4_all.deb) ...
Unpacking replacement mythtv-common ...
Setting up mythtv-common (0.18.1-4) ...
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = "en_GB:en_US:en_GB:en",
        LC_ALL = (unset),
        LANG = "en_GB"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = "en_GB:en_US:en_GB:en",
        LC_ALL = (unset),
        LANG = "en_GB"
    are supported and installed on your system.