Place pork ribs, meaty side down, in a shallow roasting pan.
Roast ribs in a 450° oven for 30 minutes.
Remove meat from oven; drain off excess fat.
Turn ribs, meaty side up.
Reduce oven temperature to 350°.
Roast 30 minutes more.
Meanwhile, prepare fruit glaze.
In a 1-quart saucepan combine brown sugar, cornstarch, curry powder, salt, and ginger; stir in grapefruit juice.
Cook and stir over medium heat till mixture is thickened and bubbly.
Cook and stir 2 minutes more.
Spoon some of the fruit glaze over the ribs.
Roast 25 minutes more or till meat is tender and thoroughly cooked, spooning some more of the fruit glaze over ribs occasionally.
Brush with remaining glaze before serving.