Graphic bug in Safari under OSX

One of my clients sent me an image today of the newest fckeditor running via php on an apple osX machine in Safari. As you can see the text flows down out of the display area. I cannot find any setting to control the height of the editor and am uncertain how to correct this issue. I'd like to tell them and everyone else on the planet to use only FF, but sadly cannot. The only alterations I made to the config was for tool selection.

// the one change in the config file
FCKConfig.ToolbarSets["Default"] = [
   ['Source'],
   ['Cut','Copy','Paste','PasteText','PasteWord','-','Print'],
   ['Undo','Redo','-','Find','Replace','-','SelectAll','RemoveFormat'],
   ['FitWindow','ShowBlocks','-','About'],
   '/',
   ['Bold','Italic','Underline','StrikeThrough','-','Subscript','Superscript'],
   ['OrderedList','UnorderedList','-','Outdent','Indent','Blockquote'],
   ['JustifyLeft','JustifyCenter','JustifyRight','JustifyFull'],
   ['TextColor','BGColor'],
   '/',
   ['Style','FontFormat','FontName','FontSize']

] ;

// Object creation in php
$oFCKeditor = new FCKeditor("Description");
$oFCKeditor->BasePath = "fckeditor/";
$oFCKeditor->Value = $Description;
$oFCKeditor->Create();