Comment 7 for bug 608631

@Данило Шеган: With the French default layout (at least on Ubuntu), you can insert this character via "Alt Gr + v".

After some googling, I fund that you can also insert it in some Windows programs (eg MS Word) via "shift + ctrl + space" or "ctrl + space (on Writer, only on Windows apparently).

So this is supported quite widely.

On Ubuntu "Alt Gr + v" work well through Firefox. (and no eating problem)
This is also supposed to work with modern browsers (including IE 8) but some tests (again, thanks Google) say that it is not *displayed* rightly in, at least, IE 7, Safari 4 and Chrome 2 (I don't know if insertion works with these).

As said by verdy_p, fundamentally French typography require nnbsp, not nbsp.

So I think we need a tag for it in rosetta ([nbthin]?).
And, even if there seems to be no more "char eating" problem, we need it to easily spot the difference between
" " and " ".
It's much easier for reviewers ;-)