I have a 512mb shuffle and for the last few days it has been acting quite odd. whats happening is everytime its been turned off and sits for more than a couple hours it will rarely turn on again. the only fix I have found in to plug it into the usb port then unmount and unplug right away. odd yes? my only thought is that since I switched to tiger I never updated to use it in itunes. kept my playlist the same. I did a clean install of tiger and had not yet built a new custom playlist for it so I hadn't yet synced it with itunes in tiger. so last time it was sync with itunes was 4.7.1 on panth and now with 4.8 on tiger. I wiped it clean and filled it again but its still having the issue. oh.. and the battery indicator light only works when it wants to.