According to Jim Episode 2.01 The Importance of Being Jim

Jim buys a digital camera from one of Dana's ex-boyfriends, and it comes with stored pictures of the woman he dumped Dana for. Cheryl thinks it will make Dana feel better if she saw how ugly the new girl is, but Jim simply deletes the pictures because they weren't important enough for him. They start a fight about what's important to each one of them and Cheryl hides his new camera. Jim tries to get back at her, unsuccessfully. When Kyle starts to take his first steps, the camera is nowhere to be found and the moment is lost forever. That's when Cheryl realizes her actions didn't do any good. They make up and agree on paying more attention to what's important to each other.