Yep, that was the problem. Beta 17 works for me.

Thanks, Emmanuel.

Well, I'm super-eager to try the 3.0 beta, but I can't seem to install it. [:(] Java Web Start loads it, but always ends with the error: "Unable to launch the application." Uninstalling through the Java console and reinstalling does no good.

SW3D v2.6 still runs (and uninstalls and reinstalls ...