Looks like our implementation doesn't match CL's after all.
(blah2-call) evaluates to (2 5) in Common Lisp, but [2, undefined] in Parenscript.
(defun blah1 () (values 2 5))
(defun blah2 () (blah1))
(defun blah2-call () (multiple-value-bind (a b) (blah2) (list a b)))
Daniel