Rangers responded within two minutes as Kevin Thomson's free-kick into the area eventually fell to McCulloch, who found the net with the aid of a deflection off ChrisInnes.
From the resulting corner, the ball broke out to Barron, who was deployed in central defence in the absence of ChrisInnes, and he clipped the top of the crossbar with a long-range pile-driver.
Determined to make amends, McArthur skinned Mair on the left wing and pinged a ball across the face of the goal that ChrisInnes managed to scoop over his own bar, with Mensing waiting to pounce.