From my research there is a couple of ways to fix this problem.
One being going into the "Show custom editor option" once the FCKEditor loads on your page. From there you need to make sure the "Editor area CSS" is set to static.
If this doesn't work like in my case I was forced to find another solution which closely matches yours.
Simply add a #body tag in your skin.css file and move everything from the body tag to the #body tag.
From this:
body {
font: 12px "Geneva", Arial, Helvetica, sans-serif bold;
background:#cde7ff url(img/background-800px.gif) top center repeat-y;
color:#FFFFFF;
line-height:1.2em;
margin:0 auto;
padding:0;
text-align:center
}
To this:
#body {
font: 12px "Geneva", Arial, Helvetica, sans-serif bold;
background:#cde7ff url(img/background-800px.gif) top center repeat-y;
color:#FFFFFF;
line-height:1.2em;
margin:0 auto;
padding:0;
text-align:center
}
Here is the
URL that explanation of this