Internet Explorer shows weird resize-controls

Hi,

I get weird resizing-controls around text-blocks (<p>) in Internet Explorer (8):

http://img443.imageshack.us/img443/4631 ... 01208u.png

respectively

http://img812.imageshack.us/img812/4631 ... 01208u.png

if I hover the text

On the official demo-page (on ckeditor.com) there are no such controls. Do I need to disable some plugin, or set some option to get rid of this? Currently I'm running CKEditor with these options:

toolbarCanCollapse : false,
toolbarStartupExpanded : false,
removePlugins: 'wysiwygarea,elementspath,menu,menubutton,toolbar,contextmenu,styles',
resize_enabled: false,
customConfig: '',
contentsCss: 'stylesheets/section.text.content.dummy.css'

Any ideas?

Thanks
Lukas