Thank you Martin.
But as I understand, sul tasto and flautando are different techniques?
I suspect however that difference in sound is probably very small; I checked our good friend mr Adler, and he says:
sul tasto: on the fingerboard
flautando: near, but not on the fingerboard
The difference is really minimal, and many composers make no distinction between the two terms.
Adler, second edition, p 35
Still, it is a different technique , hence the confusion.
As for Chamber Strings: no, they have neither sul tasto, neither flautando.
I'm really wondering if the Strings will still be expanded, but VSL will probably not give a clue until they actually do it...
Correct me if I'm wrong, VSL-people 
Cheers,
Alex