Well my experience with the Hearthstone Tribute continues to deteriorate. I discovered a crack in the stone on the right hand rear stone, and a small crack in the right hand lower side stone as well. I don't know how long it's been there. I was stirring the coals to get them to burn out so I could scoop the ash out for this evenings burn and I noticed a small crack on the cement on the inside of the firebox. I investigated farther, and under the rear heat shield, sure enough there is a crack in the stone. :sick: I can't get an answer form the other dealer in NE, and I don't know if this is safe to burn, as is, till I can talk to a dealer about a warranty claim for this, as well as the warranty claim on-going for the warped door. I know that we haven't over-fired the stove, as we have a thermometer on the top front stone in front of the vent. It has never been over 550*. Do I burn, or call for an emergency delivery of heating oil, It's going to get to -4 tonight.