At 46:38, when Harry is typing a letter on his computer, the address seen on the monitor displays a ZIP code in Portland, Oregon as 98765. In actuality, the first three digits for Portland, Oregon ZIP codes are 972, and the first two digits for Oregon ZIP codes are 97.
At 01:11:00, when Diana asks David why he did not call her after moving out from his wife, he says that he did not call her, because she was married. Diana then removes her wedding ring and proceeds to kiss him. In the next scene, while she is still kissing him, her wedding ring is back on her finger.
Harry Stevenson: There is a story about the greek gods. They were bored, so they invented human beings, but they were still bored, so they invented love. Then they weren't bored any longer, so they decided to try love for themselves. And finally they invented laughter, so they could stand it.