Full screen problem

Maybe someone can help me with this.

I have a web page that uses percentages for layout. When I hit FCKeditor's button for full screen editing, it works wonderfully.

Here's the problem. When I switch to a different theme that uses absolute pixel positioning, the full screen mode drops off the side of the browser area. No matter how large I make the browser window, the editing space tries to compensate. As a result, I am unable to access the data in the last right and bottom inch.

What would be ideal is if I could pop the editor into its own z-index level or have an alternate style sheet accessed when using full screen edit.

Is there a way to do this? If not, any ideas besides rewriting the style sheet?

Thanks in advance,
Matt