When Sarah and Jordan first meet in his flat she has bare legs. Throughout the rest of the film she switches from bare legs to wearing tights and back, over and over.
At 1h12m, when Jordan receives a text message on his phone, the timestamp of the message is not at Christmastime, as the scene music implies, but "Tue Jun 9, 10:07 PM."
Stuart and Jordan are talking when Stuart says "He needs to stop saying that he sees Sarah". Nowhere earlier did Jordan mention to him that he was.
When Stuart arrives at Jordan's flat, Sarah pops up behind him on the couch to which Jordan jumps and says "she's back". Sarah then says "I told you no one else can see me". At no point earlier did she say this.
At 1h12m, when Jordan receives a text message on his phone, the time stamp of the message is not at Christmastime, as the scene music implies, but "Tue Jun 9, 10:07 PM."
When Max saves Sarah from being hit by the bus at the end of the film, the bus stops a little bit further on. Sarah then sees Daphne through one of the windows even though she cannot see the side windows from where she is standing. Only the rear of the bus can be seen from that angle.