We have a major problem with our 1996 850GLT. We had the timing belt replaced at 110K miles last February at a local maintenance shop (they have serviced all our different models of cars in the past and seemed to always do a good job). Then, a month later, the belt broke. The shop owner told us that we must pay for it because the timing belt was not faulty - he said a piece had shredded off another belt, lodged around the camshaft, and caused the belt to break (which seemed strange since all the other belts were new on the car too). We paid for replacement of the engine with a 70K mile used engine, and they put a new timing belt in it and warrantied the whole works for 10K miles.

Now, while still under warranty, the timing belt has jumped and caused terminal engine damage again. This time the shop is absorbing the cost of replacement.
This makes us very nervous and we are considering just selling the car. Has anyone heard of such a problem, or have any idea what might be causing it? It's too much of a coincidence!