Apple has posted
iPod Updater 2005-09-23, available for download through the Software Update system preference pane or from Apple’s Web site.
The update includes new iPod Software 1.1.2, specifically for the iPod shuffle. It contains the same software versions for other iPods as iPod Updater 2005-09-06.
Apple said that iPod Software 1.1.2 for iPod shuffle delivers “bug fixes for iPod shuffle,” but does not describe them any further.