Right here on the list, message <glm67dfthvg.fsf@caffeine.mitre.org>
reproducibly induces the following trace in p0.35:

Signaling: (wrong-type-argument listp "'")
  article-translate-strings((("‚" . ",") ("ƒ" . "f") ("„" . ",,") ("‹" . "<") ("Œ" . "OE") ("…" . "...") ("‘" . "`") ("’" . "'") ("“" . "``") ("”" . "''") ("•" . "*") ("–" . "-") ("—" . "-") ("™" . "(TM)") ("›" . ">") ("œ" . "oe") ("´" . "'")))
  article-treat-dumbquotes()
  apply(article-treat-dumbquotes nil)
  (if interactive (call-interactively (quote article-treat-dumbquotes)) (apply (quote article-treat-dumbquotes) args))
)
  (save-excursion (set-buffer gnus-article-buffer) (if interactive (call-interactively ...) (apply ... args)))
)
  gnus-article-treat-dumbquotes()
  run-hooks(gnus-article-treat-dumbquotes)
  apply(run-hooks gnus-article-treat-dumbquotes)
  gnus-run-hooks(gnus-article-display-hook)
  gnus-article-prepare-display()
  gnus-article-prepare(19509 nil)
  gnus-summary-display-article(19509 nil)
  gnus-summary-select-article(nil force)
  gnus-summary-show-article(nil)
  call-interactively(gnus-summary-show-article)

My gnus-article-display-hook setting is:

(gnus-article-hide-headers-if-wanted
 gnus-article-hide-boring-headers
 gnus-article-treat-overstrike
 gnus-article-maybe-highlight
 gnus-article-display-x-face
 gnus-article-highlight-citation
 gnus-article-emphasize
 gnus-article-date-lapsed
 gnus-article-hide-pgp
 gnus-article-treat-dumbquotes
 gnus-smiley-display)

Interestingly, the only "'" in the entire message is found in the
In-Reply-To: header.

--karl