Comment 19 for bug 133315

All files from the old package will be removed and the files from the new package will be installed on upgrades.
There should be no remaining files outside /etc. (or other files marked as conffiles, should not be the case for .mo files.)

You can search for packages containing guidance.mo files with 'dpkg -S guidance.mo'.

If this was fixed in some new package, the versionnumber might not be bumped properly or something similar.