Now I know what's up with underscores.

.emacs.d/custom.el

@@ -15,6 +15,7 @@
  '(comint-prompt-read-only t)
  '(comint-scroll-to-bottom-on-input t)
  '(css-indent-offset 2)
+ '(debug-on-error nil)
  '(fast-lock-cache-directories (quote ("~/flc-cache")))
  '(fast-lock-minimum-size nil)
  '(fill-column 77)

site-lisp/ox-quip.el

@@ -4,7 +4,6 @@
 ;; Publisher from org-mode to Quip.  (Export as markdown, push as a new
 ;; thread or amend to existing quip thread.)
 ;;
-;; BUG: Underscores get converted wrong.
 ;; BUG: Can't update documents on publish.
 
 ;;; Code: