Continuity mistake: When Karen is sitting at her desk, she says "get out, already," and she has one bottle of nail varnish in her hand, and there are bottles on the desk in front of her. In the next shot she holds about four bottles in her hand, and now the bottles on the desk in front of her are differently positioned.
Continuity mistake: When Will phones Jack, while he hides in the bathroom, Jack puts a plate of chicken down and answers the telephone. Then through the following conversation they have the position of the fried chicken pieces on the plate differ.
Continuity mistake: Karen is pretending to be a maid in her own hotel suite, as she talks to Grace. During her conversation, she throws her feather duster into the pocket, at the end of her cleaning cart. In following shots the position of the duster changes.