1. You don't have to worry about 3rd Party Repositories. If you have Wine, Skype, Opera, Mediabuntu or any other 3rd party repo installed you have to make sure they are ready for Gutsy and get updated as well. Some 3rd party repos might not be as easy to update as others.
2. If you have any Compiz-Fusion running on your Feisty install you'll have to completely uninstall it, remove the 3rd party repo you installed it from and reinstall Ubuntu-desktop and the Feisty version of Compiz. There is no way around this. If you don't do all these steps right, you are going to run into a lot of problems with Compiz-Fusion in Gutsy. All Compiz-Fusion guides for Feisty where hacky (including mine) and have potential to cause these conflicting install & dependency problems.
3. I LOVE Ubuntu, but updating it from one version to another sucks and doesn't work. I'm sure people will argue this with me, but they're full of it. Upgrading is a real pain and posses too many problems and complications to ever be a realistic choice. If you want things to work like there supposed to install it fresh. Gutsy is totally worth the work. If one thing is broken during the update you run the risk of losing your ability to actually use Ubuntu. While in Linux everything is fixable, but if you aren't comfortable with the command line you run the risk of completely hosing your system and not being able to get your data back.
Tips for Installing Gutsy
1. Have your Home folder on a different partition.
2. Back up your Home folder.
3. Back up your Home folder. (Not a typo, its so important it needs to be said twice)
edited by pHreaksYcle