When Jane is picked up at the prison, Chevrolet Volt has headrests on the front seats. According to plot, couple of hours later, when driving way from Red John's house, headrests are gone, to give camera a good view of the dashboard (Chevy Volt promotional campaign).
On Debbi Lupin's Missing Persons flyer, they list her as blonde with blue eyes, right next to a picture of the actress with clearly brown hair and eyes.