Birmingham boss Wayne Rooney suffered the indignity of hearing his side booed off following a 2-0 loss against Hull in his first home game in charge on Wednesday.
Rooney was hired to mastermind a promotion push after replacing the sacked John Eustace, but the former Manchester United and England star has lost his first two matches with the Blues.
Liam Delap's 12th-minute goal and a superb solo effort from Jaden Philogene made it a miserable St Andrew's debut for Rooney against his former Derby assistant Liam Rosenior, who is now in charge of Hull.
Birmingham's players were jeered at half-time and there was also abuse directed at Rooney from a minority of fans unhappy with his appointment before louder boos at full-time.
Rooney had emerged from a pyrotechnic display and blue and white smoke to warm applause on his way to the dugout before kick-off.
But the mood soon turned sour to emphasise the size of the task facing Rooney, whose team are currently 12th in the second tier.
Second-placed Ipswich kept the pressure on leaders Leicester with a 1-0 win at Bristol City.
Nathan Broadhead's first-half goal earned Kieran McKenna's side a 10th victory in 12 league games as they played their first fixture since October 7.
Patrick Bamford missed a penalty before Pascal Struijk scored an own goal as Leeds' three-match winning run was halted by a 1-0 defeat at Stoke.
Struijk's 80th-minute own goal came five minutes after Bamford blazed over the crossbar from 12 yards.
Leeds remained third after Preston and Southampton drew 2-2 at Deepdale.
Kyle Walker-Peters gave Southampton a 33rd-minute lead before Milutin Osmajic equalised and Brad Potts struck to put Preston ahead.
Ched Evans's own goal in the sixth minute of stoppage time
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