Edtor resizing misbehaving

    CKEDITOR.editorConfig = function( config )
    {
       // Define changes to default configuration here. For example:
       // config.language = 'fr';
       // config.uiColor = '#AADC6E';
      config.toolbar =
    [
        ['Source','-','Preview'],
        ['Cut','Copy','Paste','PasteText','PasteFromWord','-','SpellChecker', 'Scayt'],
        ['Undo','Redo','-','Find','Replace','-','SelectAll','RemoveFormat'],
        ['Bold','Italic','Underline'],
        ['NumberedList','BulletedList','-','Outdent','Indent','Blockquote'],
        ['JustifyLeft','JustifyCenter','JustifyRight','JustifyBlock'],
        ['Link','Unlink','Anchor'],
        ['Image','Table','HorizontalRule','Smiley','SpecialChar'],
        '/',
        ['Styles','Format','Font','FontSize'],
        ['Maximize', 'ShowBlocks','-','About']
    ];
      config.resize_enabled = true;
      config.resize_maxWidth = 550;
      config.height = 300;
      config.width = 550;
      config.toolbarStartupExpanded = false;
    };