I could not find the latest firmware on Nikon US website, but here is the UK version:
The following improvements have been made in version 1.2.
– When shooting in a user setting mode at an image quality setting of NRW (RAW) + Fine, NRW (RAW) + Normal, or NRW (RAW) + Basic and Distortion control enabled, some JPEG images were corrupted. This issue has been resolved.
– As distortion control cannot be used in conjunction with interval timer shooting, settings have now been modified so that they cannot be enabled simultaneously.
– Electric current consumption has been reduced.
– When shooting in “P”, “S”, “A”, or “M” mode at an image size setting other than 13M 4224 ×3168 and an image quality setting of NRW (RAW) + Fine, NRW (RAW) + Normal, or NRW (RAW) + Basic, the image size setting switched to 13M 4224 ×3168 when the camera was turned off and then turned on again. This issue has been resolved.