By default Internet Explorer automatically converts all URLs in hyperlinks (anchor tags) and images (img tags) to absolute URLs.

In the Cute Editor.NET. there is a property named RemoveServerNamesFromUrl.
 
When this property is set to true (the default), CuteEditor strips out the local server name from all A and IMG tags if the hostname in the URL matches the current hostname on the serve side.

We will implement this function in the ASP future version as well.