Cannot enable Java 1.6 (Java SE 6) for Applets

On my system (Leopard 10.5.7 - latest patches), Java for Mac OS X 10.5 Update 4 it seems to be impossible to enable Java 1.6 (aka Java SE 6) for use by applets in the browser. I moved the SE 6 to the top in the Java Preferences app.
In the Browser (both Safari 4 and Firefox 3), go to http://javatester.org/version.html or http://www.java.com/en/download/help/testvm.xml
to get the Java Version available to applets. It shows:
Java Version: 1.5.0_19 from Apple
On the command line we see that the right version is selected:
$ java -version
java version "1.6.0_13"
Java(TM) SE Runtime Environment (build 1.6.0_13-b03-211)
Java HotSpot(TM) 64-Bit Server VM (build 11.3-b02-83, mixed mode)
This is a long standing problem and there is no fix yet. This basically prevents Mac Users from using Java Applets that require Java SE 6 / Java 1.6.

Richard is correct: Java 1.6 in Mac OS X 10.5 is only 64-bit and I know of no full 64-bit web browsers currently available. One person has complied a very rudimentary browser just for running 64-bit web applets, though:
http://www.ornl.gov/~t6p/Main/Utilities.html
Otherwise you can only run 64-bit Java apps as standalone, not as web applets.
Regards.

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