From Vera's blog:
There was an issue with the passport printing machine in Port au Prince, but is has been resolved.
There were "rumors" that the machine was out of ink, but that was not the case. The electricity cable to the passport machine had gone missing. Without electricity, you cannot print passports. Thus, there were a few days when no passports could be printed.
However, there is a cable now and last week, passports were being printed.