I've set high expectations on DSM 4.2 to boost my now old DS109 with more features and improved performance. The beta is out!
Also, as announced in their blog a few months ago, the DSM 4.2 brings an Android version of the DS Video application that was until now only available to Apple users. Among the improvements are the introduction of SMB2 and Large MTU support.
This will also end 4 years of continuous improvements for my DS109 as DSM 4.2 is the last version delivered to the phasing out x09 series.
DSM 4.2 Beta release note
DSM 4.2 Beta Live Demo
DSM 4.2 Beta download