August

While shooting the scene in the art gallery, the film crew had to contend with an annoyed upstairs neighbor who protested the intrusion by stomping his feet on the floor. His persistent efforts resulted in minor damage to one of the pictures hanging on the wall.

It appears that within days of shaving his head Troy has a full head of hair again when he meets Jonathan to have a look at the the apartment. This is not a continuity error, the film's chronology is not linear. Even though the apartment scene is shown to us after the head shaving, in the film's timeline it took place before.

Edited from Postmortem (2005)