Instruct: Classify Amazon reviews into positive or negative sentiment
Query: DANGER! Series 3 DVD may not play on your DVD player

Acorn has a serious production problem with Series 3. No problems with Series 1 & 2 of this great historical drama, but we have tried two sets of Series 3 with the same result - neither disk would play on our BluRay player. We re-tested with Series 1 and 2, and again had no problems. We have given up on Series 3 - hope they fix the defect.