Jar executable issue after jvm update

Question

I created a small demo application and bundled my classes and media files in a jar executable file. Everything was fine until I updated J2SE from 1.5.0 to 1.6.0_01.
The application now starts, gets its input normally but soon after hangs, and the Swing GUI doesn't show up anymore.
The jar file contains 4 packages (one of them contains the main class) and this simple manifest file:
Main-Class: myapp.myAppLauncher
Classpath: .\myapp.jar
I created the jar as follows:
jar cvfm gdv.jar Manifest.txt myapp mypackage2 mypackage3 mypackage4
I recompiled the source before creating the jar archive, and if I launch the application from the console I see no difference from before. The problem is only for the jar version.

Answer 1

Manually download and install the Java 4 update http://www.apple.com/downloads/macosx/apple/application_updates/javaformacosx105 update4.html, and Safari 4.0.1 http://www.apple.com/safari/download/ Run Software update, install anything that pop up, repair permissions, and restart. That should fix your problem.