[O] Suspected bug: Invisible cursor in calendar buffer.

[Alain . Cochard]

[8.2.10 (release_8.2.10 @ /usr/share/emacs/24.5/lisp/org/)] 
GNU Emacs 24.5.1 (x86_64-redhat-linux-gnu, GTK+ Version 3.14.12) of
2015-04-17 on buildvm-04.phx2.fedoraproject.org

Hello.

I do: 'emacs -Q new_file.org'.

Once in the file I do: 'C-c .'  I see in the minibuffer:
  
   Date+time [2015-05-19]:   => < 2015-05-19 Tue > 

I then click with the mouse inside the calendar buffer at an inactive
place, say just before the '17' of May.  In the minibuffer, the part
after the colon disappears.

I then type 'C-f' (calendar-forward-day); the (red) cursor in the
calendar buffer does not move at all.  However, I can see that it is
somehow working because after a single 'C-f' and <RET>, the string
inserted in the file is '<2015-05-17 Sun>'; after two 'C-f' and <RET>,
it is '<2015-05-18 Mon>', etc.  Simply, nothing shows cursor movement.

Is this behavior normal?  If so, is there a way to get the behavior I
expect (i.e., to see the cursor move to the next day after each
'C-f')?

Thank you.

By contrast, if I stay in the minibuffer and use, say, <S-right>, the
cursor in the calendar buffer moves as expected, and the part after
the colon in the minibuffer changes accordingly.

Also, if I do 'emacs -Q -nw new_file.org', 'C-c .' and twice 'C-x o'
so as to go to the calendar buffer, then a green cursor does move as
expected after each 'C-f' (even though the red cursor remains on
today's date).

Finally, on another computer with configuration 
   Org-mode version 6.21b
   GNU Emacs 23.1.1 (i386-redhat-linux-gnu, GTK+ Version 2.18.9) of
   2013-07-17 on c6b10.bsys.dev.centos.org
I do get the behavior I expect.