I have had problems trying to record a screencast for Gnome Shell 3.2.1, the top and bottom panels disappear when I activate the recordmydesktop command to record the desktop to a file. I have found a solution linked below that should work and allow me to record a nice video of my Gnome Shell desktop. But Fedora Core 16 is a very good Linux distribution and can perform many tasks admirably indeed, the Ubuntu Unity interface is similar to the Gnome Shell desktop interface but is inferior to the Gnome 3 desktop. With Gnome Shell available for the Ubuntu distribution, why would you want to use the eldritch Unity desktop. The Gnome Shell 3.2.1 desktop allows you to install extensions from the Gnome website. The best action that Canonical can take in the future is to summarily execute the Unity interface and replace it with Gnome Shell. If you use the gnome-tweak-tool and tweak the fonts and make the font scaling a little smaller then the desktop can look better. The Mist Metacity theme is a good choice for Gnome Shell, the window borders are larger and makes manipulating windows a little easier.
There is an interesting submission on Slashdot that is discussing the continued prevalance of the Windows XP operating system after all of this time. It came out in 2001 and in 2012 it is still being used by many home users and businesses evensure with the many security issues and viruses that target this Windows release hence you should be running Windows 7 by now and not this poor insecure excuse for an operating system that is a target for countless malicious websites and malicious software that has had 10 years to mature and develop 1000 ways to attack unprotected Windows installations. As I said in my comment on that story, a lot of people still run Windows XP with Internet Explorer 8.0. As the default web browser. That is a good way to get Malware and viruses without much effort. If Microsoft could spend some of their billions on securing their operating system instead of developing a fancy tablet interface for Windows 8 then they might be able to create something that can compete with Fedora Core 16 and NSA Selinux. I run kernel 3.2-rc2 and that is fairly recent, with some nice features. Windows XP is too long in the tooth to be a worthwhile desktop installation, better to install Ubuntu or Fedora.