On August 12th, 2004 Apple released iPod software 3.0.1 for iPods with a click wheel. The company says that the updater contains the same software versions as iPod Updater 2004-07-15 for all other iPod models.
According to the release notes, iPod Software 3.0.1 provides improved connectivity with some FireWire cards using the VIA chipset, improved performance with the optional external battery pack, improved power management, and improved connectivity with FireWire hubs, and with 4-pin FireWire ports.
The updater will also correct a glitch that would awake iPods when a user removed the headphone jack while the hold switch was turned on. iPod users may obtain the 10.6 MB updater through Apple’s Software Update mechanism.