[Orgmode] [org-BEAMER] block without header

[Andrea Crotti]

I don't find how I can get something translated as

\begin{block}{}
where the header of the block is empty and get more space below.
There is also an option for ignoreheading but it only works with BMcol,
and if I don't write anything there it doesn't work...

Now I ended with something ugly like this but still the bar remains
--8<---------------cut here---------------start------------->8---
***** __                                                            :B_block:
      :PROPERTIES:
      :BEAMER_env: block
      :END:
--8<---------------cut here---------------end--------------->8---


Any help?
Thanks a lot

PS. I would like to get it done since I pushed so much to use beamer
    with my 2 collegues that they should not find some points to attack
    it :D