Hello Nickybeit,
This is a browser behavior of IE9. You can reproduce the same behavior with and editable DIV / IFRAME as well as our competitors' editors. You can see the following video for more information:
http://screencast.com/t/8YzpWFHW3CG.
and test the same scenario with the following editable DIV:
<div contenteditable="true" style="width:300px;height:300px;border: 1px solid red;">sample content</div>
The clipboard content is provided by the OS and browser and RadEditor does not modify it except when the Word specific formatting is stripped.
What you can only do is to render the page in IE8 mode using the following tag:
<meta http-equiv="X-UA-Compatible" content="IE=8" />
and see whether this will fix the browser behavior.
Best regards,
Rumen
the Telerik team
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