The Elgg core was upgraded from 1.7.15 to 1.8.19, which represented a major upgrade for Elgg and included major changes to the internal Elgg API, requiring plugins created or modified for the CyberSKA platform to be updated or in some cases replaced.  Some user interface changes also resulted.  For example, tabbed views have been used to reduce the number of menu items in the left hand side menus.  The sidebar is now more frequently used to display information such as recent comments on blogs, a tag cloud, etc.  More details of the Elgg-specific changes can be found at http://www.cyberska.org/CHANGES.txt