No, that's why it's an unknown error! \
Sometimes this error happens for no conceivable reason and you just have to walk through all the troubleshooting steps until it goes away.
- Upgrade to latest version of iTunes (6.0.2):http://www.apple.com/itunes/download/
- Upgrade to latest version of iPod Updater (2006-01-10):http://www.apple.com/ipod/download/
- Reset iPod:http://docs.info.apple.com/article.html?artnum=61705