We haven't experienced this with our Motorola Droid Bionic just yet, but apparently many new Droid Bionic owners are hearing a high-pitched whine during audio playback through the headphones. The support forums on Motorola are filled with the same complaint, and apparently the sound clicks off when the audio player is closed out.
We're not sure if this is an isolated issue that only punishes early adopters, and Motorola hasn't given an official word about it one way or the other. We're hoping the company releases an update soon, if only to prevent a bunch of frustrated customers demanding a refund. If you have a Droid Bionic and have suffered this problem, let us know in the comments.