Was using the MaintainScrollPositionOnPostback=true in a page directive with the ASP.Net 2.0 Wizard control and started getting a stack overflow error when clicking on a Sidebar button. Could not find a decent fix so I opted for a workaround and removed the MaintainScrollPositionOnPostback attribute and implemented this:
http://aspnet.4guysfromrolla.com/articles/111704-1.2.aspx