We have been running version 3.0.2 for a while now on our development and testing servers. Pretty stable with no data losses. For those sites who have been waiting for the development iterations to settle down to a less hectic pace, now is a pretty good time to install.
There have been a lot of minor tweaks to the underlying code and usability improvements for authors.
https://github.com/olab/Open-Labyrinth/releases
The above link is for downloading the latest version from Github, but if you just want to try out some cases for yourself, check out:
http://demo.openlabyrinth.ca/
You will also notice quite a few Greek language cases on there. A nice testament to the regional flexibility of OpenLabyrinth.