i just got my replacement macbook adapter and it still whines like crazy...the whine only takes place when the book is charging and gets louder depeding on what batter level it is charging from (the lower the louder). I guess this is just normal behaviour? anyone else have this with their macbook? also its worth mentioning that the whinning frequency changes for a second when you open an application and when scrolling you can hear a statitcy type sound...uhg its annoying.