Panasonic announced on their website that the previously promised GH4 firmware update will be delayed till January, 2015.
Fujifilm released major new firmware updates for their X-Pro1, X-E1, X-E2 and X-T1 mirrorless cameras with several new improvements. For more details, see the release notes in the links provided.
Canon released firmware update 1.1.6 for the EOS 6D DSLR camera.
Sony released firmware update 2.0 for the Sony a77 II camera.
