When Jake and Justine take Teddy for swimming classes the first time, Miss Jenn (swimming instructor) throws a blue colored toy float towards Jake as a sarcasm for his fear of cold water.
In the next scene we see that toy float between open arms of Jenn instead of being near Jake or Teddy.
When Rose Byrne is drinking a glass of wine with one of her young students (who is taking an exam), the student asks for a glass of wine jokingly, and the waitress brings it. The wine glasses constantly change positions between shots.
In the bathroom scene when Teddy is sick and Justine passes him to Jake afterwards the necklace that she is wearing is missing sometimes when they cut back for between them when they are talking.
In the credits, Walk on the Ocean is listed as performed by Toad the Wet Sprocket, but then says courtesy of Todd the Wet Sprocket.