Putting on the complete Dreadful Vampire Suit (Drunkula's outfit) from the Gear Changer causes this log message:
34061081180957418055735996 is out of range, returning 0
In addition, mafia reports 5996/5996 HP and 0 / 5996 MP. In reality I have 2529/2734 MP. 5996 is likely the correct figure...