I got an email from Patrick Hostenbach at Los Alamos National Laboratory asking for me to tweak Net::OAI::Harvester a bit. His OAI-PMH repository is particularly strict and it turns out N::O::H was ocassionally passing a name/value pair that caused problems.
I'm really happy to hear LANL is using the module since Herbert Van de Sompel at LANL was one of the chief architects of the OAI-PMH. It was devised partly as a way for people to harvest metadata from the arXiv eprint archive.
