Plot hole: At Tim's funeral, Olivia's attorney tells her that Tim had himself removed from Olivia's Last Will and Testament, proving he loved her and didn't want her money. However, an attorney could not legally change a client's Will without that person's knowledge and drafting a revised version.
Suggested correction: Not true. Anyone can have themselves removed as a beneficiary of a will. This is done by signing an Affidavit of Disclaimer of Inheritance at such time as someone becomes aware that they have been included in a will as a beneficiary. This is what Tim meant when he said he had removed himself from Olivia's will.
Continuity mistake: When the condo manager shows up at Billy's house to take Purple, and chases him round the garage, some stuff, including a white plastic basket, falls off a shelf twice; first in the wide shot, then again in a closeup of Purple's feet.
Visible crew/equipment: When Nicolas Cage returns to his apartment, you can see a crew member reflected in the mirror on the wall right after Cage passes in front of it. (00:11:35)
Audio problem: When in the bar before being put in the cell, Dolph grabs a gun from an MP and starts shooting up the bar. The sound of gunfire starts a split-second before he starts shooting.