3/24/10. The first box I bought had one directions. And the second box I won at the swap had this new revised chart. The only thing that changes is the water(rodi) and the final batch. Example. Final batch 1gal. Water rodi .98 gal. The original says final batch 1.02. Water (rodi) 1gal
I think there was an error with the specific gravity on the first chart and that has been corrected. I haven't seen the updated version. If I can scan it tonight I'll post it.