According to Nikon the firmware fix addresses the following issues:
You can download the firmware from the Nikon website.
images captured using a flash in Manual or Repeating
flash flash mode were played back with the “Overview” display enabled,
flash output level was displayed in the flash compensation portion of the
display. This issue has been resolved.
the AE/AF lock button was pressed with Special Effects mode enabled, Selective
Color selected, and the view magnified with selective color options displayed
in live view, the image did not change while live view was
active. This issue has been resolved.
- An issue that caused the Viewfinder Virtual Horizon to freeze when certain
operations were performed has been resolved.
images captured with white balance bracketing enabled were played back, a white
balance fine-tuning value of 9 (steps) was displayed even for images captured
with a fine-tuning value of 10 (steps) applied. This issue has been
issue that prevented cursor movement when certain operations were performed in
calendar playback mode has been resolved.
size of some text displayed in calendar playback mode has been modified.
D7100 firmware for Windows
D7100 firmware for Mac