Panasonic has posted firmware updates for its DMC-GH1 and DMC-G1 Micro Four-Thirds cameras. Both updates improve autofocus performance in low contrast conditions and the stability of auto exposure (AE) for the recently released Panasonic Leica 45mm F2.8 Macro lens. The GH1 firmware v1.2 also decreases the AF operation sound of the 20mm F1.7 pancake lens for quieter video recording.
source: dpreview.com
To download the firmware click here: http://panasonic.jp/support/global/cs/dsc/download/fts/dl/gh1.html
To download the G1 firmware click here: http://panasonic.jp/support/global/cs/dsc/download/fts/dl/g1.html