See the URL, page was protected using the api both with expiry=infinite and expiry=20091101000000 but they were set to 1/1/1970.
Api answer didn't provide any error: <protections><protection create="autoconfirmed" expiry="2009-11-01T00:00:00Z" /></protections>

Version: 1.14.x
Severity: normal
URL: http://es.wikipedia.org/w/index.php?title=Especial%3ARegistro&type=&user=Platonides&page=Plantilla%3APortada+Bueno%2F402