This is a minor update to MWS 1.5, adding fixes and support for S60 5th Edition. Also the REST APIs have been tweaked and fixed a bit. Check out the Group Calendar widget on how to use the Calendar APIs for example.
If you develop something with MWS, or have anything else to share please add it to the wiki also: http://wiki.forum.nokia.com/index.ph..._contributions.
Is the changelog included?