I'm using FCKeditor quite for a long time. For a new project I've developed a quite easy design for the content, two divs which are floating left. Now, using Internet Explorer (Version 6 or 7), if I want choose one div with the mouse, I can see a really big border around the div. The border also doesn't scroll down with the site, it is overlapping over the items on the top of the editor.
Here is a sample code which shows the bug:
<div style="float: left; width: 300px; height: 550px; background-color: red">Middle Content<br /> <br /> Test Test Test</div> <div style="float: left; width: 200px; height: 550px; background-color: blue">Right Content<br /> <br /> Test Test Test</div>