When I first got my Outback, when I would take a corner really fast, I would hear the same warning chime. It was funny, I thought I had some sort of sensor telling me to slow down! Then I realized it was the seatbelt chime. I did some searching and found something about 'resetting' the passenger seat by sliding it all the way back and then forward. I did this and since then haven't heard any chiming around curves... anyway, all very strange.
I'm not sure how to quote, but try this link: