The Hoops could face a possible points deduction after the Football Association this week charged them, along with chairman Gianni Paladini, with breaches of regulations relating to third-party ownership and agents.
The seven charges relate to Argentinian playmaker Alejandro Faurlin and his move from Instituto in 2008.
Faurlin took his place in the starting line-up, but it was another midfielder, Adel Taarabt, who stole the show to help Rangers move 10 points clear of the chasing pack in the second tier.
The mercurial Moroccan put in a virtuoso performance, setting up Heidar Helguson to open the scoring before winning a penalty to allow the Iceland international to net his second after the interval.
Patrick McCarthy saw red on the back of that incident as Palace's challenge petered out after James Vaughan had restored parity on the stroke of half-time.
Source: PA
Source: PA