OK, I've got my Q sound back. Here's what I've figured out:

I use my Q with headphones a great deal to listen to MP3s.

Twice now, separated by 3 months, when I disconnected the headphones, the sound in the earpiece in "Normal" profile was disabled. It continued to work fine through the headphones and the speakerphone, but nada from the earpiece.

I soft reset, took battery out, cleared memory, triple checked the earpiece volume via the jog dial, etc. No luck.

But when if I turn the Q on, plug in a headphone, and then unplug it, the sound magically returned to the earpiece.

Bug? I think so. It's only happened twice to me so far....

Anyone else experience this? Any other ideas?