I believe there are some new "hidden" lens profiles added to this update. How do I know? I recently purchased a Summarit-M 75/2.4 from B&H, and tried it on my M 240. The previous firmware would not recognize the lens (a la 6-bit coding). That frustration led me to discovering the new firmware update.
After the update, the camera recognized the lens! Excellent! But strangely, the Summarit lenses are not listed anywhere in the lens profiles when you select 'MANUAL' and scroll through the settings. I find that kind of odd. With the camera lens detection set to 'AUTO', the camera recognized the lens perfectly. Strange!