Sony has released another software update for their Sony Concept for Android Marshmallow and whilst the update does not include as many features as the last one it comes with some performance improvements and bug fixes.
The Sony Concept for Android Marshmallow software update comes with the build number MDB08M.Z1.2157-somc and it is available for Xperia devices that are running the software.
Included in the latest software update are a number of bug fixes for email and also improvements to notifications, the user interface and also the automatic brightness feature.
The Sony Concept for Android Marshmallow has been released as an over the air update for people who are participating in the testing program, you can check to see if the update is available for your Xperia device from the setting menu.
Source Xperia Blog