So yesterday, I plugged my headphones in and started up Canola to listen to music, and (to my considerable embarrassment, since I was in a library), it played over my N800's speakers, not the headphones. Of course, I checked the connection, and it was definitely all the way in and everything.

Also, I experimented with it a bit, and even with the headphones in, all system sounds also went over the speakers. Additionally, plugging in or removing the headphones didn't wake the display when it was dim or off like it normally does.

All this made it seem like more of a hardware problem, and not just something in software. (Also, I haven't used anything like fm radio which can switch between the two in a really long time).

Anyway, as the battery was low, I turned it off, took the battery out briefly, and then put it back in and charged it (with the unit off) to reset it as thoroughly as possible (short of flashing, of course). When I powered it back on this morning, it works fine, so it apparently isn't that the headphone jack has gotten totally disconnected from it or anything like that.

Still, I've never heard of this happening before, and I'm a bit worried. Is this something I should consider contacting Nokia about? I've had the device for almost three months now, so I doubt I can go back to the vendor (amazon.com) about it, but its still under warranty.