Sony Mobile has released a new firmware update for its Android 6.0 Marshmallow Concept software, moving the build number to MDB08M.Z1.2157-somc. After a feature-packed build in the last update, this new version mainly focuses on small enhancements and bug fixes. Sony has changed the automatic brightness in this version, as well as fixing some issues with the Sony Email app (11.0.A.0.3).
This includes a user interface issue when a number of mails would interfere with the subject line. Sony has also fixed the issue when viewing attached problems along with a bug fix on notifications. The update is rolling out OTA to all beta participants right now.
Thanks Timo and Vicky!