ummm when did you get this camera is it new can you take it back?? that vignetting is pretty bad only time i have seen it this bad on a P&S is when some one attaches a lens to it
i can't find another reference to this problem with this camera on Google.. so i cant say for sure that its just your camera...but i suspect soo
EDIT: i actually found a reiview which was the one i was looking for in fist place.. with test shots .. steves shots do have some vignetting but no where near as bad as yours ..
http://www.steves-digicams.com/2006_...2_samples.html