In my case, if the ADSL connection is off, it tries to connect to the internet; I just dismiss the connection dialog and everything works.

I think that nowadays almost no program does not try to "phone home" for purposes that range from license check to usage statistics reporting. The amusing thing is that even if you instruct the things to keep mum, they often still try to connect anyway (e.g. SketchUp, even with net connection option unchecked tries to phone home). Welcome in 1984.

Bye.

GIMP 2.7.4, Inkscape 0.48, Genetica 3.6 Basic, FilterForge 3 Professional, Blender 2.61, SketchUp 8, PoserPro 2012, Vue 10 Infinite, World Machine 2.3, GeoControl 2