During the scenes where the girls are taken to a Roller Skating Rink, Barb is the only one not wearing roller skates, she has on a pair of black Roller blades.
When the bus hits the small silver sedan, you can see several sets of skid marks on the pavement that were obviously left by previous takes or practices in exactly the same location.
At the Hex, Tommy Lee Jones is holding a candle that goes out and is re-lit. The candle is short at this point. Near the end of the scene he holds the candle up and it's much longer.
When Roland and Heather are talking and the newspaper is on the table with the story about Roland's partner being wounded, Heather's hair goes from neat and combed to unkempt in successive shots.