When customizing the appearance of the CC.NET Web Dashboard, you often need to modify the file c:\Program Files\CruiseControl.NET\webdashboard\dashboard.config. However, you won't see the changes you make there reflected back in the browser until that file is reloaded.
The easiest way to reload dashboard.config is to quickly modify web.config (add a space and delete it), and save. This forces IIS to reload the web application, which in turn causes dashboard.config to give up it's new settings. This is especially useful in a hosted environment where you don't have access to administration-level tools.
An alternative would be to just bounce the entire web server by stopping and starting the service, but that's not always feasible nor practical.