[O] [babel] #+call-line removes hlines and headings ?

[Marc-Oliver Ihm]

Hello !

Generally enjoying babel very much, I have stumbled across a behaviour, that I 
do not quite understand:
As it seems, a #+call in babel removes hlines from the results.

Here is an example:

#+call: foo()
| 3 | 4 |

#+name: foo
#+begin_src emacs-lisp
'((1 2) hline (3 4))
#+end_src

#+results: foo
| 1 | 2 |
|---+---|
| 3 | 4 |


The #+begin_src-line does what I would expect; however, when it is called 
through a #+call-line the hline
and the heading are removed.

Is this the intended behaviour, a bug or am I missing something obvious ?

Thanx a lot for any help !

with kind regards, Marc-Oliver Ihm