One thing you should look for is the spine label at the top of the keepcase - on the new discs, it should read: Jurassic Park (WS) (DTS). That said, THE ONLY SURE WAY TO IDENTIFY THE FIXED VERSION IS BY THE NUMBERS ON THE INSIDE RING OF THE ACTUAL DISC. The FIXED disc will read: PEMC-D2R2. The earlier pressings - the defective ones - read either PEMC-D2R0 or PEMC-D2R1. Note that it's our belief that the DTS version of The Lost World does not share this defect.