Panasonic has released a firmware update for the GH4. The improvement is: 1. Improved the reliability of video recording performance. It was issued today, 2014/07/01.
Also the lustrous Leica G 42.5mm f1.2 Nocticron got an update as well. The lens is know as to Panasonic as the H-NS043. The improvements are: 1. Improved the motion picture quality under high sensitivity in use with GH4.
For those of you who have a Lumix GM1 there is an update as well. The improvements are: 1. Connection problem with Apple iOS devices via Wi-Fi is fixed.
The update can be found here: http://panasonic.jp/support/global/cs/dsc/download/fts/index.html