Bug: Kill ring contains non-killed output after an export to pdf [8.2.5h (8.2.5h-30-gdd810b-elpa @ /Users/kosta/.emacs.d/elpa/org-20140303/)]

[Konstantin Kliakhandler <kosta@slumpy.org>]

Hello,

Whenever I export an org file to pdf, subsequently my kill-ring contains
the tex code of the intermediate latex stage.

Steps to reproduce:
1. Paste the following into an org buffer:
* test
* another test
2. Press [C-c C-e l p] to export to pdf (note: on my machine the pdf
didn't compile, but this is irrelevant for illustration purposes).
3. Press C-y anywhere in emacs, and you will get the following inserted:

% Created 2014-04-05 Sat 19:28
\documentclass[11pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fixltx2e}
\usepackage{graphicx}
\usepackage{longtable}
\usepackage{float}
\usepackage{wrapfig}
\usepackage{rotating}
\usepackage[normalem]{ulem}
\usepackage{amsmath}
\usepackage{textcomp}
\usepackage{marvosym}
\usepackage{wasysym}
\usepackage{amssymb}
\usepackage{hyperref}
\tolerance=1000
\author{user}
\date{\today}
\title{test.org}
\hypersetup{
  pdfkeywords={},
  pdfsubject={},
  pdfcreator={Emacs 24.3.50.1 (Org mode 8.2.5h)}}
\begin{document}

\maketitle
\tableofcontents

\section{test}
\label{sec-1}
\section{another test}
\label{sec-2}
% Emacs 24.3.50.1 (Org mode 8.2.5h)
\end{document}

What I would expect to get: the last thing I killed.

Thanks in advance!

Emacs  : GNU Emacs 24.3.50.1 (x86_64-apple-darwin, NS apple-appkit-1038.36)
 of 2014-02-28 on bob.porkrind.org
Package: Org-mode version 8.2.5h (8.2.5h-30-gdd810b-elpa @ /Users/kosta/.emacs.d/elpa/org-20140303/)

current state:
==============
(setq
 org-tab-first-hook '(org-hide-block-toggle-maybe org-src-native-tab-command-maybe
		      org-babel-hide-result-toggle-maybe org-babel-header-arg-expand)
 org-speed-command-hook '(org-speed-command-default-hook org-babel-speed-command-hook)
 org-occur-hook '(org-first-headline-recenter)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-html-format-drawer-function '(lambda (name contents) contents)
 org-log-done 'time
 org-format-latex-options '(:foreground default :background default :scale 1.5 :html-foreground
			    "Black" :html-background "Transparent" :html-scale 1.0 :matchers
			    ("begin" "$1" "$" "$$" "\\(" "\\["))
 org-latex-format-inlinetask-function 'ignore
 org-confirm-shell-link-function 'yes-or-no-p
 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default
 org-pretty-entities t
 org-agenda-custom-commands '(("w" todo "TODO")
			      ("h" agenda "" ((org-agenda-show-all-dates nil)))
			      ("W" agenda ""
			       ((org-agenda-ndays 21) (org-agenda-show-all-dates nil)))
			      ("A" agenda ""
			       ((org-agenda-ndays 1) (org-agenda-overriding-header "Today")))
			      )
 org-latex-format-headline-function 'org-latex-format-headline-default-function
 org-default-notes-file "~/Dropbox/Documents/Org/notes.org"
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-latex-format-drawer-function '(lambda (name contents) contents)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer org-src-mode-configure-edit-buffer)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-pretty-entities-include-sub-superscripts nil
 org-babel-pre-tangle-hook '(save-buffer)
 org-mode-hook '(#[nil "\300\301\302\303\304$\207"
		   [org-add-hook change-major-mode-hook org-show-block-all append local] 5]
		 #[nil "\300\301\302\303\304$\207"
		   [org-add-hook change-major-mode-hook org-babel-show-result-all append local]
		   5]
		 org-babel-result-hide-spec org-babel-hide-all-hashes setup-org-mode)
 org-use-speed-commands t
 org-ascii-format-drawer-function '(lambda (name contents width) contents)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point org-babel-execute-safely-maybe)
 org-directory "~/Dropbox/Documents/Org/"
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
		  org-cycle-hide-inline-tasks org-cycle-show-empty-lines
		  org-optimize-window-after-visibility-change)
 org-todo-keywords '((type "TODO(t!)" "STARTED(s)" "WAITING(w@/!)" "|" "CANCELLED(c)"
		      "FUTURE(f)" "DONE(d!)")
		     (type "Note(n)") (type "Event(e)")
		     (sequence "PROJECT(p)" "|" "COMPLETE(c@)"))
 org-confirm-elisp-link-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-html-format-headline-function 'ignore
 org-latex-preview-ltxpng-directory "/tmp/org-ltxpng/"
 org-html-format-inlinetask-function 'ignore
 org-agenda-files '("~/Dropbox/Documents/Org/")
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 )