Java Webstart icons stop working after Sun Java is updated to a new version

[Soltész András]

Ubuntu 9.04, Jaunty

Never experienced this before on any previous Ubuntu release and I have been using Webstart on Ubuntu for a long time.

The error message (translated back from Hungarian):
It was not possible to execute the child process ("/usr/lib/jvm/java-6-sun-1.6.0.13/jre/bin/javaws") No such file or folder.

It looks like that Sun Java is installed in a folder called "java-6-sun-1.6.0.13" instead of the traditional "java-6-sun".

When a newer version is installed, an other directory will be created for Java and all of the Webstart desktop Icons stop working.

Manually correcting the icons to "/usr/lib/jvm/java-6-sun-1.6.0.14/" works.

Extremely annoying, has never happened on Windows (earlier Ubuntus neither).