Another update is now available for this lens.

http://dl01.olympus-imaging.com/ww/u.../index03a.html

Firmware Update for OLYMPUS DIGITAL LENS
[ M.ZUIKO DIGITAL ED 12-50mm F3.5-6.3 EZ ]
Ver.1.3
(Jan. 15 2015)
Stability of lens aperture when shooting videos has been improved.