Java Plugins and Firefox

[Raymond Lillard]

I have just installed Ubuntu at one of my clients.  This is
their first Linux workstation.

They will be using it to extend a Java application (ImageJ)
to drive an 3-axis robotic scanner and capture data for
image analysis.  I have been encouraging Linux use here for
years and have been given the OK to do this project on Linux
since Java is also supported on Windows (which could be a fall-
back alternative if needed).

My problem is I am attempting to get the Java plugin working
with Firefox.  I have downloaded the jdk/jre/nb package which
contains the plugin, but have been unsuccessful at getting
Java working in Firefpx.

I have made symlinks from:
	<...>/jre/plugins/i386/ns7/libjavaplugin_oji.so

to:
	/usr/mozilla/plugins
	/usr/firefox/plugins
	~/,mozilla/plugins

I have verified that the links are correct as in:

root at scanner: ls -l -i -L /usr/lib/mozilla/plugins/libjavaplugin_oji.so
2261543 -rwxr-xr-x 1 root root 135084 May  3 03:22 /usr/lib/mozilla/plugins/libjavaplugin_oji.so*

As you can see the link is correct.  Even the i-node number
agrees.

In Edit->Preferences->Content <Enable Java> is checked.

All updates are in place.

Yet when I restart Firefox and try to use Java content,
I am prompted to load the Java plugin.

If I need a clue stick, please apply liberally, otherwise
something is broke.

Thanks for any help,
Ray

PS I have been using Dapper Drake for a year this coming
   November on my laptop.  I have the identical symlink
   in place on it and have been using java there.  I am
   unable to find any differences.