DreamWeaver Templates & <iframe>s

Why doesn't DMX update the src?

[muppets]

As you know when using DreamWeaver templates all the links change depending on where the page you create from the template is saved.

ie. if DWT is located in /templates/main.dwt then a link to an image might be ../images/image.gif. If the page I create from this template is saved in the root the DWT will automatically change the link to this image to images/image.gif

Why does it not do this with <iframe src=""> addresses? Do you know any good workarounds?