For the first time, when i tried to shutdown PSP (quick shutdown/hold for 5 secs), it won't, while i am listening songs. No matter how i did it, or adjust settings. I was so afarid to remove the battery that my power button is spolit, my PSP wont start again. At last, i did remove battery. And i tried to on the PSP, luckily, it works, shutdown also works back to normal by then. Anyone encounter this problem too using M33 3.52 patch 4?