(at around 4 mins) When Aída tries to escape from the AA meeting, she slams against the door causing the entire wall to wobble, revealing the wall is really a set.
(at around 41 mins) When Aída is faking talking on the phone, her lips don't match her words when the camera angle changes, just before she finishes her line about the eviction order. This line was re-dubbed to tone it down; it originally said "chumino" (Spanish for "twat") instead of "culo" (Spanish for "butt").