Apple has released a 1.3 firmware update for 5th Generation iPods which includes "bug fixes". Few other details are currently available, and the update should appear in iTunes when you sync your iPod.
The 5th generation iPod was released in late 2005. From Apple's guide:
The iPod (5th generation) is a a hard drive-based iPod featuring a large, widescreen color display, a Click Wheel, and the capability of displaying photos and videos. Like iPod nano, it uses USB for syncing and comes in white and black.