At about 10 minutes in, Max brings a tray into the living room. Jennifer picks up a napkin. In the next shot, a close-up, she's holding a drinks glass, the napkin has disappeared. In the next, long shot, she's still holding the drinks glass, the napkin is on her lap.
As Jennifer, Stefanie Powers keeps her fingernails short, as can be seen when she's holding up the mirror in the car. The fingernails on the thumbs holding up the mirror are much longer. In the next shot, of Stefanie holding the mirror, her fingernails can be seen as very short.