Just updated mine, here's the info: D300S firmware: A/B 1.01 Support for 64 GB memory cards has been added. When the Multi-Power Battery Pack MB-D10 was used with AA batteries, the battery indicator showed that MB-D10 batteries were exhausted or power supply switched to the battery inserted in the camera even when sufficient charge remained with the MB-D10 batteries. This issue has been resolved. When some memory cards were inserted in the camera, “CHA” was displayed in the top control panel and images could not be captured. This issue has been resolved.