Continuity mistake: Near the beginning of the film when Abby and Neil sit down at the table drinking wine, the amount of wine in Abby's glass changes from almost full to almost empty between shots.
Other mistake: Chris' leg cast was thigh-high. When he got out of bed (and used crutches), his cast was OVER his pants. His pants' leg did not appear to be cut off - it was securely under the cast and never changed despite all the fighting/activity he engaged in. (00:36:22)