(at around 56 mins) Caleb is sitting in a chair in the background when Jamie asks James if James still loves him. In a reaction shot, Caleb is standing in a doorway.
(at around 56 mins) When James and Jamie are talking about Ceth and about their relationship, the dancer in the back goes from topless in one shot, to with a top in the next.
(at around 1h 9 mins) The moment Jamie enters alone the swimming pool he is fully naked. When he is rescued by 'the stalker', you can see a (very short) underwater shot of his body wearing black underwear/swimwear.
(at around 22 mins) When viewing his profile Ceth reads Magnum's "measurements". An important one is listed as 15cm, which receives a gasp from Sofia. In reality 15cm is a bit under 6 inches, which is about average.