You mean, what an utter mess the Java Applet Plugin is. And it is, but keep in mind that the Java team signed up for a world of hurt: they produced a design whose attack surface is an entire programming language, complete with networking and a user interface toolkit and all the timers, retention cycles, native code bindings, and other junk that comes with it.

Surely there are several bugs here that aren't specific to the Applet Plugin, but their impact is probably minimal outside of the plugin.