Prevent IE 9/10 JavaScript error

Both IE 9 & 10 generate a "SCRIPT70: Permission denied" when looping through the parents in the CMS. This happens after data has been edited in a UploadField iframe (eg: submitted Title change), followed by a click on any SiteTree link.

To reproduce:
1) In the CMS (using IE 9 or 10), add / attach any file to an UploadField
2) Edit the file's Title, click save
3) Click on any other SiteTree link in the Pages list

Result:
"SCRIPT70: Permission denied" - and the CMS "hangs" until reloaded