Hi,
I have a similar problem to that reported in
www.modelio.org/forum/advsearch.html?q=F...=1&childforums=1
in using Modelio 2.2 on Ubuntu 12.04 (with GNOME Classic) running with OpenJDK6.
I noticed that if I double-click on an element too many times or too rapidly, or I use right mouse click too many times on an element (when the first right mouse click does not bring up the menu), Modelio
locks up 
.
I cannot close the application. The only way I could regain control is to kill the process using System Monitor.
Because it is happens so often but randomly I now save the project everytime I add or change something. Not very nice.
Is there a word around on this issue?
Thanks.