java plugin is unable to handle long URLs (more than ~480 characters)

scenario:
---------

from a java applet, use 'showDocument' method the display
a page inside a frame.

if you try to send a URL more than 480 (~) the worker pipe
between the jvm and the plugin breaks.
according to the traces and the source code of the plugin
everything seems to work fine until the plugin tries to read
the URL and the frame from the pipe (the JAVA_PLUGIN_SHOW_DOCUMENT request
is actually received by the plugin , cf JavaVM5.cpp: DoWork)

I used mozilla 1.4b. I tried to load a more than 500 characters URL manualy
on mozilla and everything is fine.

environement:
-------------

java plugin:

Java(TM) Plug-in 1.4.2_02-b03


you will find in attachement all the traces and the applet
I used to trigger the problem.

the applet is quite simple :
the web page open 2 frames : one contains a button and an entry. just put a length in the entry and push the
button. the applet will try to load a dummy URL of the specified length inside the second frame.

for instance with '500' the URL will be : <document code base>/page_to_load.html? <500 times 'e'>









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