While talking to Wendy and Hodges, Mandy's hands go from her lap to her face in between shots.
When Hodges and Wendy are in the locker room and the game board falls out of the locker, the game board box on the floor changes positions in between shots.
When Archie is photographing the drugs in the lab, he pulls the same package from the case twice.
When Catherine is testing for PCP, she puts the piece of the plant in the bag and cracks it and shakes it. The blue square inside the bag changes in between shots. It's at the bottom in one shot, then in the next, it's in the top of the bag.
When Grissom is investigating Hodges' "death", Hodges states that the pager used in the zip gun is a pre-1990s pager that does not have a display for a call back number, but during the replay of how the zip gun works, the pager shown has a display and a Las Vegas area code number is shown on the display.
When Mandy takes the food out of the microwave, she's holding it like it's extremely hot, but when she sits down and takes a bite, she doesn't act like it's hot anymore.
When Nick is picking up the baking soda as evidence of how the bomb was made, he does picks it up with bare hands. No gloves. As a CSI, he would never do this because it would contaminate the evidence.