For a couple days now, I have noticed that often the sound on the onboard speaker just stops. I mostly notice through keyboard clicks that just stop...and sometimes start up again in the middle of composing a note or email or something. I also notice it when watching a video or listening to music without my headphones in (which is not very often). In that case I can see that there is no volume slider - as if the iPod doesn't recignize that there is an internal audio output device at all! I have tried various things to keeo this from happening: soft/hard resets, going back to factory aettings and restoring from backup, going back to factiry settings and NOT restoring from backup (but resyncing all my apps). Even while typing this post, the keyboard clicks have stopped and started a couple times. I have the latest iPhone OS available to me: 3.1.2, I think. The really weird part: when onboard audio output drops, inserting and then removing headphones seems to get the onboard audio output working again, at least temporarily. I have googled this topic and found lots if similar complaints, but no solutions that wirk permanently. Anyone else?