#1 Jar launch failure on JAVA 6

[Sea Mac]

Jar launch failure on JAVA 6:

MacPro3,1 with OS X 10.5.5 and Latest JAVA 6 installed.

Console Log:

10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] Exception
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] in thread "main" java.lang.UnsupportedClassVersionError: Bad version number in .class file
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at java.lang.ClassLoader.defineClass1(Native Method)
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at java.lang.ClassLoader.defineClass(ClassLoader.java:675)
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at java.security.AccessController.doPrivileged(Native Method)
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at java.lang.ClassLoader.loadClass(ClassLoader.java:316)
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:280)
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
10/15/08 10:29:45 PM [0x0-0x289289].com.apple.JarLauncher[36886] at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)