Graphic bug in Safari under OSX

// 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();