When Caroline dives in to rescue the dummy, her hair is plastered down on her forehead. In the next shot it is pushed back.
When Ripley speeds off after blowing up the houseboat, his ventriloquist's dummy disappears.
When Stephanie, Caroline and C.J. talk about the auditions, Stephanie crosses her arms with her left fingers folded under her armpit. In the next shot they are resting on her forearm.
When Jill makes her comment about Ripley impersonating Tom Cruise, the makeup brush in her hand turns into a nail file. In later shots it turns into a fine-tooth comb. Jill makes the errors very easy to see, making it unclear whether they are actual errors or satire of errors in Charlie's Angels.