Like most Ubuntu updates, version 11.10 isn't a huge overhaul; rather, it improves on the big changes made in 11.04, by cleaning up the Dash, overhauling the Ubuntu Software Center, and bringing in some new default software. Here's a look at the biggest changes in the newly released beta. Ubuntu 11.04 ushered in some grand changes to the default Ubuntu desktop, most notably the new Unity interface. 11.10 refines some of Unity's rougher edges, while adding in a few new convenience features as well. We won't go through every little change here (as there are a lot of small ones), but here are some of the bigger ones you'll notice off the bat, and (mostly) be thankful for. The Dash, Simplified The Dash, introduced in Ubuntu 11.04, is a nice little launcher that gives you quick access to your applications and files through a quick search. It had a few little clunks, though, that made it annoying to use in 11.04. Now, the Dash only has one button, at the top of your d...