Last week, we gave a KNIME beginners course in house and ask the people to install KNIME before. At the time we sent that email around we were not aware that KNIME 3 is already available as download as there was no announcement at this point. So it happened that the people had KNIME 3 installed as it is the top download of the download site. At this time, no community extensions were included with the full download.
Finally people started to download KNIME 2.12 during the course as some nodes were not available in KNIME 3.
All in all it would have been nice if the latest stable KNIME release (2.12) is the one on top of the download site. Then, people would have installed this.