there's something up with this code or something. i'm having the same problem with the Tone tutorial. i've been working with the arduino for a couple of months, and this is the first time i've seen this error. i wiped the IDE from my computer and redownloaded the same version, and i got the same error.
for what it's worth, i'm on a PC using windows 7.
if anybody can look into this and figure it out, that would be super great. i was really looking forward to using this tutorial to play different tunes.