No.

You might want to wait till the end of the month, backup and do a fresh
installation of Ubuntu 10.04. It is an LTS release and it will be good for
support for three years instead of the usual 18 months. It is worth doing
for many reasons. I remember the old days when multimedia did not work, etc.
Now it works as well as 32-bit.

Something occurred to me about a previous conversation. You might want to
consider installing Virtualbox and installing a distribution in that. Then
you can run your proxy server and anything else that you are considering
that affects the internet from there. You can then shut the internet
connection so that nothing can get in or out. You cna configure your proxy
server and then not worry about turning it on or off when you don't want it.