This ugly quick fix might help:
;; Ugly and weird, and written without much understanding of the ;; real issues that it fixes. Beware. (defmethod clim:presentation-type-of ((object standard-generic-function)) 'clim:expression)
I don't know why CMUCL is saying that (clim:presentation-type-of #'documentation) is STANDARD-GENERIC-FUNCTION, which doesn't seem to be defined as a presentation type. It doesn't happen for me on SBCL. Perhaps a more CMUCL-knowledgable person could weigh in?
-Peter