I've tweaked the tinderbox build scripts so that they'll automatically try to build and use a private copy of zlib if it doesn't seem to be installed and to build and test the Search::Xapian perl bindings: http://www.oligarchy.co.uk/tinderbox/xapian/status.html There are still a few kinks to sort out, but hopefully this can help us catch any portability issues before the release. Cheers, Olly