It appears that there can be something with the contact in the audio jack that makes the Macbook Pro think there's still a headphone plugged in. The home fix is apparently to wiggle it, maybe even with a toothpick. Apple's fix is apparently a new logic board which I imagine I could get since it's been less than 90 days since I got the computer but I'm only going to take it in if it keeps this up. What's strange is that it will be working fine and then apparently switch back to headphone mode with no apparent warning. -- Cheryl May the words of my mouth and the meditation of my heart be acceptable to You, Lord, my rock and my Redeemer. (Psalm 19:14 HCSB)