Found via a WebmasterWorld thread, a Google AdSense Brasil thread has a note from Marcelo from the Google AdSense team that some Brazilian publishers won’t be paid this month.

The translated version of what he said is:

This has happened before with publishers both in the U.S. and outside of the U.S. It has also happened to mass numbers of publishers and individual publishers.

So if you do not get paid this month, this is why.

Forum discussion at WebmasterWorld & Google AdSense Brasil.