Continuity mistake: When Dean goes to the hospital, the police officer hands him a large manilla envelope containing the photos of Annie/Joanna. Dean folds the envelope in half, pressing it together firmly, then shoves it into a jacket pocket. Later, when Dean gives the photos to Billy, the envelope is flat and the pictures are in mint condition - no bends or wrinkles.
Continuity mistake: Near the end of the movie, Dean is on the Coast Guard ship chasing Annie's yacht as the captain gets a call they have to break off the chase to go after poachers. The ship begins turning around. Realizing this, Dean makes his way astern and jumps off the rear of the ship and begins swimming toward the yacht, and toward the camera as if viewed from the yacht. As the Coast Guard crew realizes he is in the water they begin to come about to the port (left) side to rescue him, making the left side of the boat visible to the camera, still with Dean swimming toward the yacht (and the camera). Moments later, Annie jumps off the yacht and begins swimming toward Dean, but in the distance, with the camera behind Annie, the Coast Guard ship can be seen coming about to the starboard (right), with the right side of the ship visible to the camera, when just moments before the same camera vantage point showed it turning to the left.