Hi everyone! First time sony network walkman user (E407), and it's been a love hate relationship ever since i took the sucker home. Im posting because I just want to know if i am alone a lil problem i have with the player. Whenever i turn on shuffle function on the E407(firmware 2.00) it would play for 10min to 1 hour and then completely shut off by itself with a lil pop sound in the earphones. I thought it was static shock at first.. but it happens even if i leave to play(in shuffle mode) on a desk. Don't know if it happened on firmware 1.00, since i upgraded a day after purchase. Is there a way to rollback the firmware?