Childress cut Marcus Robinson on Christmas Eve after Robinson criticized the offense.
He also fined Troy Williamson for being away from the team after Williamson's grandmother passed away. The fines were later rescinded, but still.
Don't want to read in anything or try to extrapolate any Machiavellian moves / ulterior motives here, but you have to think that if Childress was still the Vikes coach, he'd start Jackson just to give him some more experience / reps with the season in the bag. With Frazier already coming out and saying Favre is starting, Favre gets to protect and extend his precious streak of starts.
