A few hours after the last post, I got this from P. Stott at UNESCO:
Quote: We seem to be having difficulty with our database, which seems to be unstable. (Corrections I made in September have been replaced by earlier locations.)
So I've been waiting a few days, and there have been some corrections, which I now posted. I also made some changes to the output KML, so the Places-tree gets a little bit less cluttered on sites with multiple locations.