Olympus just posted a firmware update for the M.Zuiko 9-18 mm. The new version 1.1 "resolves unstable exposure during sequential shooting when using C-AF on the E-M5". I don't have the E-M5 yet (hopefully by Thursday if *********** comes through). The 9-18 mm is my favorite architecture and landscape lens. I will therefore update to the new firmware via my G1 tonight. Please note that the link I provided will only work for updating the lens firmware via Panasonic body.