Bingo!!! Much as I want to like an app that works on either a Windows or *nix machine, Navgator is rapidly wearing out its welcome with moves like this and the business of not letting the host system resolve locks, etc. for serial ports on its own. It's enough to make me want to load up wine on my openSUSE machine and fire up SeaClear 2.
P.S. the problem with sound is a little nastier than one might expect. I was listening to streaming audio (using amarok) and when I exited from Navgator, it killed the audio from amarok, too. I had to kill and re-start it to get sound running again.
