This is the second time this has happened: I was roasting a chicken on a rack in a ceramic baking dish, and at cleaning time I discovered it had cracked! The last time it happened I had been roasting fish. Both times the highest the oven had been was 425...too hot? I've roasted veggies in these dishes at even higher temps with no problem. What did I do wrong? And, am I right to assume that once it's cracked it's good for the garbage? I'm very frustrated as I loved both these dishes, but perhaps they should be used only for lasagne and vegetables? Please help before I ruin any more cookware!