Yes.. there's some kind of problem. I didn't change anything on the script, so I guess now the NYT has a different way to validate who and how is getting the info.
After your report (thanks!) I tried several aproaches, but no one sucessfull. The only link that is still working, is the one based on NYT-RSS:
http://tupalmx.com/pruebasphp/grab_NYT-2.php
I will keep trying to get the original link to work... stay tuned... as soon as I resolve this I will post another message.