Ok, the use of a comma as a decimal separator and a period as a thousands separator is more common that I thought, like half of the countries, so I will stop feeling awkward about using it in front of a mixed public.
@Alexis No idea and I can't find much info on it, so maybe wikipedia or the book from the mid nineties it cites is wrong or Croatians are so embarrassed about it that they keep hush about it as much as possible.
@kurt Oh, that sucks, that's no good. How does that even happen.
(And what's the anchor point? Is it always a comma before the last two digits, or is it always the first separator that's a comma?)