The palette change and "whistle shrine" bugs are fixed. Great job on those.
...But, I found more whistle bugs while testing the latter bug fix in 758 with my 2.10 quest.
1) If you play the whistle such that Link can't walk any farther south without the screen scrolling, the game will freeze when the duck/whirlwind reaches the end of the screen with Link inside. You can continue with F6, however.
2) If you play the whistle such that Link can't walk any farther north without the screen scrolling (and Link is picked up), the screen will scroll up to the whistle destination instead of to the right. Similarly, the duck/whirlwind will move from south to north (instead of west to east) and drop Link off.