Dust in Viewfinder of New SX10-Should I Worry?

[mightysparrow]

Just received my new SX10 IS from Amazon, and it has one speck of dust in the upper right area of the viewfinder. There is no dust showing on the first test photo I took with the camera. Should I worry about the dust speck and send the camera back? Would I likely receive a camera without dust in the viewfinder if I did exchange the first unit with a new one? Can the dust migrate to a part of the camera where it could affect image quality?

Thanks for the help! This is my first Canon Point-n-shoot.

Jeff