modprobe for tun driver failed

My school uses the Juniper Network Connect client software to provide a VPN solution. So the typical usage scenario is that you go to vpn.organization.com and login with your credentials. Then you click on the start button against the network connect. Then it installs a java client on your machine and you are connected to the school network, and all is dandy.

This was working fine till I installed Linux Mint 9 Isadora on my laptop and one fine day it just stopped working for me. Every time it would try to install the client, I would get an error message saying:

modprobe for tun driver failed

I searched for solutions online and I found this: http://mad-scientist.us/juniper.html
The guy is providing a custom script to help you install the client on your machine, but I realized that I did not have to go so far. I also found some people saying that the juniper client has had issues with openjdk on certain linux systems. So I went ahead and uninstalled openjdk from my box:
$ sudo apt-get remove openjdk-6-jre

Next I installed sun's jdk and browser plugin:
sudo apt-get install sun-java6-jre sun-java6-jdk sun-java6-plugin
I restarted the browser, went back to vpn.organization.com, and everything started working fine, even though I continued to get the modprobe error.