Here comes a quick overview on recent updates to Kolab 16 packages.
Please note: I am only using public information. I have no background knowledge about the releases.
In the past days, the package roundcubemail has been updated from 1.2 to version 1.3. It affects both RHEL/CentOS and Debian/Ubuntu. Other packages have been rebuilt due to this upgrade:
Here is a link to the Roundcube Mail 1.3 Release notes: Roundcube Webmail 1.3.0 released.