Comment 12 for bug 436648

Jeremy - that sounds like a separate translation bug - possibly the translation was only done as a suggestion and not approved by the en_AU team, or it was made after the deadline at 00:00 on 22 October 2009 (ref: https://wiki.ubuntu.com/KarmicReleaseSchedule). If the string has now been translated then no doubt it will be included in the first langpack update following release.

I'd suggest that you get in touch with the en_AU translation team here: https://wiki.ubuntu.com/AustralianTranslationTeam