Dynamic versioning -- does it work

Despite dynamic versioning being poorly documented in the Java Plugin Guide, I thought I had an understanding of how it should work. However I just learned that it does not behave as I expected. Is this a bug, or did I misunderstand?
Here is my understanding of how dynamic plugin versioning works:
Syntax.
a) classid. Use the dynamic class id (as in my example below).
b) mime type. specify "version" (not "jpi-version"), and specify the 2-digit version, such as "1.2", "1.3", "1.4".
c) codebase. provide a path to download a JRE if necessary.
<object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
codebase="[path_to_the_jre]/j2re-1_4_1_01-windows-i586.exe">
<param name="type" value="application/x-java-applet;version=1.4">
<param name="archive" value="myjar.jar">
<param name="code" value="myapp.MyApp">
</object>
Behavior.
a) If not installed, the user would be prompted to download and install the code located at the specified codebase.
b) If the user had a JRE installed which was less than the major version specified in the mime type (i.e., 1.2, 1.3, 1.4), the program would NOT run using the installed version. Instead, the user would be prompted to download and install the code located at the specified codebase. Once the install completes, the program would run using the newly installed plugin.
c) Otherwise, the program would run using the currently installed plugin.
Is this correct or not? What I am seeing contradicts this. On a cleanly installed Win2k machine, I have only installed JRE 1.3.1. I use a tag like the above which should require the user to install JRE 1.4+ before running the applet. However, no download/install prompt appears, and the applet just runs in the 1.3.1 JRE.
I would appreciate any feedback that you could give. Thanks.

Well I hate to answer my own question, but I solved my problem. I didn't realize that the "#Version=1,4,0,0" portion of the codebase was significant. In the examples given by Sun, I assumed it was part of the download URL. To the contrary, the JRE appears to examine this version number to determine which version to require. I had assumed that this was the purpose of the version specified in the mime type (i.e., "version=1.4"). Live and learn.
The revised code:
<object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
codebase="[path_to_the_jre]/j2re-1_4_1_01-windows-i586.exe#Version=1,4,0,0">
<param name="type" value="application/x-java-applet;version=1.4">
<param name="archive" value="myjar.jar">
<param name="code" value="myapp.MyApp">
</object>
So there's still 10 Duke's available to whoever wants them...

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