Combine 2/3 cup water and the curry powder in a saucepan and mix well. Add the lime juice, salt and garlic and mix. Stir in the remaining water and then simmer to heat through.Add pumpkin seeds and smmer for 5 minutes, stirring often. Don't boil.
Drain seeds but don't rinse. Spread on a baking sheet at least 10 by 15 inches. (Really, two is better.) Sprinkle with salt and dot with butter. Bake at 250 degrees until crisp, stirring occasionally, about 1 hour.