When Adam gives Kate the lollipop as a gift, Kate writes "IOU TLC" on a laundry ticket. As she takes the ticket out her bag, there is the number "6443" printed in red on it. When she hands him the ticket though, the number is now "6335". Later, when it is seen floating in the pond, the number is "6329".
In the scene where Dorothy is letting Campbell live in her home. He picks up his bag and puts it on his shoulder. Then the next scene when he leans in to kiss her, there is no strap on his shoulder. Then it's back again in the next shot.
When the Kate gives Adam the note on the back of her dry cleaning ticket she writes it very sloppily, but then towards the end of the movie when she finds Detective Vaugh's head in the pond with the same note next to it, it's written very neatly.
When The Cherub is stabbing the cadavers in body bags, he makes his way down to the next to the last one on the right side. He then stabs one on the left and turns back to the right again, only now there are two extra body bags on the right row.
When Kate is on the phone complaining about the water being cut off, the iron overheats. Kate then runs over to it, and the shadow of a crew member is cast on the iron and ironing board, then moves out of sight.
Shelley is bothered by seeing the face of her cadaver so she covers it. In fact, the face of the cadaver is usually kept covered from the start of dissection until the dissection of the head, which is done last.