<div id="cke_pastebin"> tags left over in CKeditor text

We are using CKeditor version 3.3.2 with Internet Explorer 7, 8 and 9. We are finding that the text that comes in from the editor sometimes has divs like the following within it:

<div id="cke_pastebin" style="left: -1000px; overflow: hidden; width: 1px; position: absolute; top: 10px; height: 1px">