JythonInterpreter plugin works OK just after installing, but after the next jEdit shutdown/restart, it never works again. The relevant error message is
1:08:20 PM [AWT-EventQueue-0] [error] BeanShellAction: java.lang.NoSuchFieldError: version
when trying "Check jython version" menu choice, and a different field for "About". For "Jython Interpreter" it hangs.
100% reproducable with jEdit 5.0, Java 7u11, on both Windows 7 64 bit and Windows Vista 32 bit. Haven't tried other jEdit versions or other OSs.