Thanks, Michael, for these extra information. It's a bit messy here: I am using an english Windows7 with a french keyboard. System locales are set to France. But this does not change the decimal separator on the numeric keypad. That one remains to be a point. Which was fine for me, as I am used to Rhino, which seems to do number parsing internally, disregarding the locale.

Anyway, things are fine now for me, and I am overwhelmed by the quality and reactivity of support and help here on the forum!

Thank you all!