A list of Breaking Changes for ASP.NET 2.0 applications running in Integrated mode on IIS 7.0
Mike Volodarsky has post a list of breaking changes for ASP.NET 2.0 application running in integrated mode on IIS 7.0
read them here http://mvolo.com/blogs/serverside/archive/2007/12/08/IIS-7.0-Breaking-Changes-ASP.NET-2.0-applications-Integrated-mode.aspx