Today I was listening to something on my MBP with headphones, and after unplugging the headphones the regular speakers would not come back on. Instead, the laptop thought there was an optical/digital cable plugged in. There is only one place to plug in either analog or digital audio, and apparently the port they have in there is pretty dodgy, because I was able to find a discussion about this issue very easily with google: http://discussions.apple.com/thread.jspa?messageID=3255575 One guy in there gave some instructions on how to "fix" it, and after trying it for a little while I got it to working again. I dunno if I should take it in for repair or just hope this "fix" works again and again. Anyway I wanted to give everyone a heads up in case they run into the same issue. If your speakers stopped working, check the headphone jack -- if you see the glowing red light inside, then you know that this is the problem.