Also, 4.12.1 distributed with Karmic has some very annoying bugs. E.g., when adding an interface to component class, after adding an interface symbol, the symbol cannot be moved and you cannot connect a interface usage symbol to it. On the current upstream version this is fixed, I installed from http://www.arakhne.org/download.html.
Currently upstream version is 4.16.1.
Also, 4.12.1 distributed with Karmic has some very annoying bugs. E.g., when adding an interface to component class, after adding an interface symbol, the symbol cannot be moved and you cannot connect a interface usage symbol to it. On the current upstream version this is fixed, I installed from http:// www.arakhne. org/download. html.
So I would consider Importance as NORMAL