Continuity mistake: When Bob puts Charlotte into her bed, he first lays her down with her skirt slightly pulled down so that her belly button is showing. In the next shot, the skirt is pulled up to meet the bottom of her shirt-barely any skin is visible. (00:52:15)
Continuity mistake: In the Karaoke scene, when it's Charlotte's turn, one briefly sees the number 601 on the door to the cabin. Later, when she's waiting outside and Bob leaves the room it's the number 602. (00:48:10)
Continuity mistake: When Charlotte listens to the soul-searching CD the picture of the author on the back cover multiplies in size between shots when she turns the box around. (00:27:20)
Continuity mistake: In the street scene where the campaigning car passes by, Bob's shoes turn from black to brown after he crosses the street. (01:14:05)
Continuity mistake: At the karaoke, when Charlotte leaves the room for a smoke and Bob joins her, her head is next to the grey part of the wall. Cut to a front shot of them and her head is now on the zebra-patterned part. (00:52:30)
Answer: I believe that it means something like "good luck", as she hoped the production goes as smoothly as possible.