An updated version of the Worldpopulation script is now available. about 2 weeks ago I noticed that the old script did not work anymore. The problem turned out to be the source website (www.census.gov) which had changed the URL.
I have updated the script and after a message from esschenk I decided to update the website. Thank you for the reminder!
More information and the (counter) scripts can be found on the Counter Page.