[O] results from Python block not visible

[Daniel Clemente]

Hi, this babel code recently stopped working on my system:

#+BEGIN_SRC python :results output
print "x"
#+END_SRC

It prints:

#+RESULTS:
: None

I expected to see "x". This worked some days ago.

If I use a command like os.system("xeyes"), I see it running.

In addition I don't see the Python block highlighted


GNU Emacs 24.4.50.1 (x86_64-unknown-linux-gnu, X toolkit, Xaw scroll bars) of 
2014-06-20 on la4
org-mode from today
Debian. Python 2.7 (same with Python 3).
It also happens under emacs -Q

Of course I loaded Python support:

(org-babel-do-load-languages
 'org-babel-load-languages
 '((R . t)
   (C . t)
; …
   (python . t)
   (ruby . t)
   (sql . t)
   (sqlite . t)))


Greetings, Daniel