Grace puts her chocolate donut down on her pad. It then vanishes, then reappears.
The bites in Graces chocolate donut change.
When Grace is cleaning the table with the playing cards on it, all the cards are separated in piles on the table, but in the next shot they're all in one big messy pile. Grace holds a small piles of cards, and never touches the big messy pile, then in the next shot she picks somehow up all the remaining cards in one neat pile.
At the beginning of the office scene between Grace and Karen, you can see the mic in the upper left corner.
When Grace says, "Oh Karen, you didn't have to buy me clothes."