I have just purchased an SD550 (using the link through this site) and am, overall, very happy with the point-and-shoot.

I have noticed, however, a faint, intermittant whoosing sound (like pulsing white noise) when taking videos with it. I downloaded a sample avi from a review and didn't hear any odd sounds, but that vid had ambient outdoor noise that may have obscured any phantom noise.

I am curious if anyone has run into this issue, I am considering a swap if its just on my camera.

Gerat site, by the way.