Alternative Character Interpretation: Too many to mention. Lets just say that there are many different opinions on Frank and April as people and the merits of their actions. Even characters dwell on interpretations of Frank and April in-universe.
Award Snub: Neither Winslet nor DiCaprio were nominated for an Oscar for their performances, although they were both nominated for Golden Globes, with Winslet winning. Plus, she still managed to pick up the Oscar for her other film that year, The Reader. Since The Reader was viewed by many as tacky Oscar Bait, a few feel this is the film Winslet should have been up for.
Big Lipped Alligator Moment: In the movie, April's Auto Erotica scene with Shep. Even though there's maybe three seconds early in the film when Shep gazes at her leaving the house, there's otherwise no major foreshadowing for this incident, and it's never spoken of again afterward. Not even when Frank openly tells April he cheated on her!. Of course, it's developed in the book and Shep dwells on this episode.