I haven't used German very much since the "reform" of 1996, but (for instance) I see that "daß" seems to have been replaced by "dass."
My question is: how seriously do people take the change? As an example, in the old days, for "except that" I would have written "außer daß", but recently I have seen "außer dass". Is "daß" now regarded as an error, or just as a variation? Would a proofreader correct it?