When the bathtub is first examined, Catherine takes out her swab to get a sample of the hair dye. The q-tip is dirty when she takes it out of the supposedly sterile box, but is clean again when she goes to collect the sample.
When Catherine and Grissom return to the house where Nick was previously thrown out the window, there's a shot of the house from the outside and the window is seen intact. Next scene shows Catherine and Grissom inside inspecting the broken window.
When Nick falls out of the window, Warrick's phone disappears from his hand between the wide and the close up.
When Brown and Stokes go to Morris Pearson's house, the company van parked in the driveway is shown missing the rear license plate.
When Sidle and Brass walk away from the suspect's house, the house number above the door is 25054. They see the suspect in his car across the street and Sidle calls for backup and medical assistance at their location, the 1800 block of New Haven Road. With a house number of 25054 the call should have been for assistance on the 25,000 block, not the 1800 block.