There is a bug with using radio buttons in a repeater control, in that they are not mutually exclusive when you run the ASP.NET page, even when you specify attribute GroupName: http://support.microsoft.com/kb/316495.
Version and release control is very important when working with any large or business-critical systems, more so once they have gone live.
In such systems, there would normally be multiple developers working on different functional areas, and there would be times when immediate/hot fixes would be required to be applied to specific versions of the systems. Without proper version and release control, the developers may need to stay away from making major changes when a deployment is due, or hot fixes may include deployment of incomplete features or may not even be possible.
Having worked with ASP.NET websites for a couple of years, I often run into problems with different culture settings in development, staging and production servers.