Anyone else getting this? I'm unable to publish.  I don't see what is unlist-like about the first argument to plist-put. 
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Debugger entered--Lisp error: (wrong-type-argument listp (:base-directory "~/RLG231/Lectures/" :base-extension "org" :publishing-directory "/ssh:matt@shimano:/var/www/sandbox/RLG231/Lectures/Slides" :recursive nil :publishing-function mwp-org-reveal-publish-to-html :headline-levels 4 :exclude "AllLectures.org" :exclude-tags note noexport :auto-preamble t))
  plist-put((:base-directory "~/RLG231/Lectures/" :base-extension "org" :publishing-directory "/ssh:matt@shimano:/var/www/sandbox/RLG231/Lectures/Slides" :recursive nil :publishing-function mwp-org-reveal-publish-to-html :headline-levels 4 :exclude "AllLectures.org" :exclude-tags note noexport :auto-preamble t) :crossrefs nil)
  org-combine-plists((:base-directory "~/RLG231/Lectures/" :base-extension "org" :publishing-directory "/ssh:matt@shimano:/var/www/sandbox/RLG231/Lectures/Slides" :recursive nil :publishing-function mwp-org-reveal-publish-to-html :headline-levels 4 :exclude "AllLectures.org" :exclude-tags note noexport :auto-preamble t) (:crossrefs nil :filter-final-output (org-publish--store-crossrefs org-publish-collect-index)))
  org-publish-org-to(reveal "/home/matt/RLG231/Lectures/07-creation-design.org" ".html" (:base-directory "~/RLG231/Lectures/" :base-extension "org" :publishing-directory "/ssh:matt@shimano:/var/www/sandbox/RLG231/Lectures/Slides" :recursive nil :publishing-function mwp-org-reveal-publish-to-html :headline-levels 4 :exclude "AllLectures.org" :exclude-tags note noexport :auto-preamble t) "/ssh:matt@shimano:/var/www/sandbox/RLG231/Lectures/Slides/")
  (let ((org-reveal-single-file t)) (org-publish-org-to (quote reveal) filename ".html" plist pub-dir))
  mwp-org-reveal-publish-to-html((:base-directory "~/RLG231/Lectures/" :base-extension "org" :publishing-directory "/ssh:matt@shimano:/var/www/sandbox/RLG231/Lectures/Slides" :recursive nil :publishing-function mwp-org-reveal-publish-to-html :headline-levels 4 :exclude "AllLectures.org" :exclude-tags note noexport :auto-preamble t) "/home/matt/RLG231/Lectures/07-creation-design.org" "/ssh:matt@shimano:/var/www/sandbox/RLG231/Lectures/Slides/")
  org-publish-file("/home/matt/RLG231/Lectures/07-creation-design.org" ("rlg231-lecture-slides" :base-directory "~/RLG231/Lectures/" :base-extension "org" :publishing-directory "/ssh:matt@shimano:/var/www/sandbox/RLG231/Lectures/Slides" :recursive nil :publishing-function mwp-org-reveal-publish-to-html :headline-levels 4 :exclude "AllLectures.org" :exclude-tags note noexport :auto-preamble t) t)

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Thank you!
Matt