In a mixing bowl, beat butter, eggs and brown sugar. Combine the flour, baking powder, salt, baking soda and nuts; stir half into egg mixture. Add pineapple, then remaining flour mixture. Pour into a greased 8x4x2 inch loaf pan. Combine sugar and cinnamon; sprinkle over loaf. Bake at 180ºC or 50-55 minutes or until bread tests done. Cool on a wire rack.