Some publishers produce non-standard conform fileopen pdfs (the length of the key attribute didn’t have the right size). In that case the script didn’t find the key. This version fixes it but I want to make it clear: The fault is on the publisher’s sloppiness and not the script side. 😉
Additional information: Python 2.7 has been released. I tested it and it’s works fine with the script. It’s recommended to use it for new installations.
More information (download links, …) can be found in the FAQs section.