I don't know if any of you guys have found this out yet, but I thought I'd bring it up just to make sure. Hearing several ideas about what causes the popping sound with the zire 71 I decided to do my own simple little test. I set the sound in the prefs app to silent and then loaded up the picture viewing program and view a picture. Now, this may look kinda goofy but put the speaker up to your ear and advance the picture with the joystick. When I adavance the photos I hear a sort of static hiss as the speker powers on, even though it is supposed to be in silent mode! If you keep listening the speaker will stop hissing and power down. Now, if you advance the picture again you should hear that good old pop as the speaker powers up again for another three seconds. I wonder why the speaker is powering up even if the unit is in silent mode. Can anyone else try this out and verify what I think is happening?