No major known issues in the release.
The internal structure of the packages has changed from the older releases (<= 4.5.x) to the Neon-based 4.6 release in an incompatible way. Every package used to consist of a single root installable unit (IU) with its real content defined as children of this single IU. The new structure uses now multiple independent root features that can be updated and/or uninstalled independently. For compatibility reasons with Oomph the main product IU of each package contains a list of those IUs with a filter (org.eclipse.epp.install.roots=true).
The build system is based on Tycho and CBI; Windows executables and Mac OS X are signed in package downloads.
The packages are being distributed based on Eclipse Platform version 4.6.