A couple days ago, an upcoming firmware of Lumia 920 with version 1232.5957.1308.0004 was spotted on Nokia’s Navifirm servers. Some of the community members with sharp eyes already downloaded the firmware and flashed their devices with it before it went offline. They reports changes in the camera for the better and a new storage option which will show how much space is consumed by what in the phone, in a somewhat pie chart like design (see it below). There’s also an option clear the cache of the phone.
The camera changes this firmware can possibly bring are to increase the sharpness, and adjustments in white balance and colours of the shots.