For those who still can't see the three boxes on top of the IMDb page "Your Lists": reinstall the script (click About > Install > Reinstall, starting on this web page). Reinstalling would be safe, wouldn't it? Not loosing any important data och settings?

I had to reinstall, because just checking for updates didn't fix it for me. My guess is that I had installed the bad version 1.49 that was including the Python code, and later the update procedure didn't understand to update from the bad 1.49 to the fixed 1.49 that included only JavaScript. Could I be right about that?

If I am, it would perhaps be a good thing to publish a copy of the fixed 1.49 and change only the version number to 1.50, so that other people stuck with the bad 1.49 (including the python code) automatically would get an update, as version 1.50?