html4 + Win7 IE9 Access Denied Security Error

A security error was caused by the line "file: currentFile" in Win7 IE9. When the error happens in the catch block, it does not trigger the 'Error' handler. Add a finally without the file to ensure the error triggers the 'Error' handler.

Other users with similar issue and more info:
http://www.plupload.com/punbb/viewtopic.php?pid=394#p394
http://www.plupload.com/punbb/viewtopic.php?id=1793