New 1308 Firmware Update for your Lumia 920 available NOW! Changelog+ inside
A new firmware update is now available for At&t's Nokia Lumia 920, what the new update 1232.5957.1308.0001 brings is still a mystery to be but I am in the process of updating my Lumia 920 and should report back in a bit.
Nokia US tweeted about the update a few minutes ago
improves proximity sensor parameters,
improved automatic display brightness adjustment
Fix for intermittent screen blanking during a call