Why not use LGPL?
If you were concerned about library issues, why not use the LGPL? In any event, it will interesting to see what happens between GNOME and KDE now that their licenses are the same. For many GTK+/GNOME developers out there, the only thing holding them back from using Qt was the lack of GPL licensing. As a current GNOME hacker, I'm off to learn some Qt now, if you'll excuse me too ;)