The 1.10 firmware update that has been shipping from the factory for a couple of weeks now has finally been released to previous purchasers of the D300. While the list of changes is long, many of those changes are to get the D300 into correspondence with other Nikon camera firmware (for example, the change in the way headings are displayed when there is no heading information from you GPS, or the addition of the Copyright information setting). There are a few useful and critical changes in the update, including some focus performance improvements and a couple of bug fixes addressing issues that only a few people tend to hit. I would strongly recommend every D300 user update their firmware. You can find the updates at all the usual Nikon worldwide support sites.