How to keep indentation with Emacs + org-mode + visual-line-mode?

Emacs + org-mode + visual-line-mode + window resizing produce this kind of view :

* My list
  * Some thing this is longer
back to line which is really
anoying
  * Other thing which is
truncated
    * Sub items with blah
to line

I would rather prefer this :

* My list
  * Some thing this is longer
    back to line which is 
    really anoying
  * Other thing which is
    truncated
    * Sub items with blah
      to line

Any clue about how to configure emacs or org-mode to achieve that would be really really appreciated :)

(emacs23.1 on ubuntu karmic)