There's a typo in the last line of the reference implementation of
UNZIP5 (in http://srfi.schemers.org/srfi-1/srfi-1-reference.scm):

                        (values '() '() '() '()))))

should be

                      (values '() '() '() '() '()))))

--
======  John David Stone - Lecturer in Computer Science and Philosophy  =====
==============  Manager of the Mathematics Local-Area Network  ==============
==============  Grinnell College - Grinnell, Iowa 50112 - USA  ==============
==========  xxxxxx@math.grin.edu - http://www.math.grin.edu/~stone/  =========