Hope this helps... I got a lock up after approx 30minute of playing time. It was playing an MP3 file, 192KBPS. I was also messing around with the setting. I didnt change anything, i was just browsing with backlight on, and on duel puff 220x176 WPS. 30GB ipod photo HP. It was at 1/3 battery, and i did not set the CPU Frequency. It was at 0. No EQ, no replaygain, no, crossfade, no crossfeed, was shuffing a 503 song playlist, and all of them are at 192KBPS mp3 and only a few 128KBPS mp3.