what is Java Applet 1.0, and why does it launch when I do an applet action?

When I go to http://www.chemaxon.com/marvin/sketch/index.php with Safari 5.1.7 on MacOS 10.6.8, an applet launches. If I then click and hold on one of the toolbars of this applet and drag to the left, the toolbar is supposed to detach. Instead, my computer launches a program called Java Applet 1.0, and a blank rectangle appears where the toolbar is supposed to be, but no buttons appear in the toolbar. The program Java Applet 1.0 does not appear to have any functions associated with it; if I click on its icon in my dock, the blank toolbar comes to he foreground, but nothing else happens. If I quit Java Applet 1.0, the original applet quits as well. A separate instance of Java Applet 1.0 launches for each browser that I use to go to http://www.chemaxon.com/marvin/sketch/index.php.

So my question is, what is the purpose of Java Applet 1.0? Is Java Applet 1.0 launching because there is a bug in the applet, or is a bug in Java Applet 1.0 causing the applet to misfire?