Hi,
Two strings have been added to Debian Installer recently. As per a new policy, these strings ar emoved to "sublevel 6" temporarily and not counted in overall statistics, which means your language still appears as 100% translated, while this file is incomplete.
I recently decided to handle these updates in a separate process for organizational reasons. This is why you're notified spearately by this mail.
Please update your translation and commit it back to D-I SVN. In case you can't, you can send me the update so that I update the repository myself.
There is no strict deadline, but doing this update as soon as possible would be a good idea: this is not that a big update..:-)