From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paul Stansell <paulstansell@gmail.com>
Subject: Very minor bug in undo applied to org table
Date: Mon, 1 Jul 2013 18:24:08 +0100
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Hello,

This seems like a very minor bug, but I thought I'd report it anyway
in case it has wider ramifications that I'm unaware of.

Create an org file with the following lines:

| 1 |
#+TBLFM: $1=2

Open it and type C-c C-c on the TBLFM line.  This replaces the '1' in
the table with a '2'.  Now type C-_ (for undo).  Not only does the
'2' revert to a '1', but a second line reading '#+TBLFM: $1=2' is
inserted directly under the first.  An second C-_ removes this second
TBLFM line.

Regards,

Paul

PS. I'm using Emacs 24.2.1 and Org-mode release_8.0.3-331-gf7e6f1 and
I tested with the minimal org-mode set-up from
http://orgmode.org/manual/Feedback.html.