The problem with this film from Meet the Parents co-writer John Hamburg is that it doesn't know what kind of comedy it wants to be. Predominantly, it's an agreeable romantic comedy, derivative yet cute, with Ben Stiller playing an overly cautious risk assessor who falls for wild former school pal Jennifer Aniston after his new wife cheats on him during their honeymoon. Stiller and Aniston's performances are reassuringly familiar, demonstrating a comfortable chemistry that's enjoyable to watch. However, getting gentle amusement from the foibles of modern romance is evidently insufficient for Hamburg, who insists on throwing in incongruous gross-out humour that would make even the Farrelly brothers wince. Such attempts to widen the movie's appeal give it an entirely uneven tone, and turn the usually brilliant Philip Seymour Hoffman into a nausea-inducing horror as Stiller's vulgar best friend. Ultimately, it's the characters' pratfalls and behavioural idiosyncrasies that provide the loudest laughs - better dialogue could have worked wonders here.