Michael Bundschuh has posted an article containing common conversion issues from going from ASP.NET 1.1 to ASP.NET 2.0. He is the guy that we have been submitting bug reports to about the upgrade wizard. Any how, he has posted this article which contains a lot of common things that you will run into when converting a web application. Although, most of you will not have to deal with this directly, you may be upgrading an application of your own down the road and this article may be of use.
Read the complete post at http://www.dotnettipoftheday.com/blog.aspx?id=90