Thanks okh for your proposal to help. [:)]
I have no special tests in mind. Reporting issues like the one about file dialog is already nice. This bug is a Java one that I can't fix directly. If you have the patience to do it, it would be great to report it.

For your information, there's still a few technical 3D issues under Mac OS X that need to be fixed before releasing version 4.2, and I have to request the translation of the new non rectangular doors and windows.