各位拿到nano4代的玩家，现在就升级新的固件吧可以关闭iPod旋转时自动切换到Cover Flow 了。
主要改变如下：1 支持 Apple 线控
2 支持 Nike 套件
3 添加一个选项，可以在nano旋转的时候关闭 Cover Flow （我等骑车听nano的人，经常要调整音量，以前只要nano一倾斜，就要掏出来摆正。。。）
4 支持 Apple In-Ear 线控套件

所有改进:
• Support for Apple In-Ear Headphones with Remote and Mic
• Support for Apple Earphones with Remote and Mic
• Fixed instability issues when using Nike + iPod Sport Kit
• Added a setting to turn off Cover Flow when rotating iPod nano and a Cover Flow menu item under the Music menu
• When Shuffle setting is set to Songs, pressing play on a song in a saved Genius playlist will now follow the Shuffle setting
• After playing a slideshow with TV out, Cover Flow album art is no longer distorted
• Waking iPod nano after hibernating no longer distorts photos
• Other minor bug fixes

可通过iTunes最新版升级