Leeds missed the chance to extend their lead at the top of the Championship following a 2-0 defeat to Hull at Elland Road.
Jarrod Bowen scored in each half to secure the Tigers a fourth consecutive win and deny Leeds eight victories in a row.
Republic of Ireland striker David McGoldrick and Billy Sharp, with a brace, did the damage in Sheffield United's 3-0 victory over Blackburn at Bramall Lane.
Sharp took his tally for the season to 16 and McGoldrick also found the net after United defender Chris Basham and Rovers midfielder Richie Smallwood were sent off.
FT| Bristol City 1 v 0 Millers.
— Rotherham United (@OfficialRUFC) December 29, 2018
A tough afternoon for the luckless Millers, who slip to a defeat at Ashton Gate, as they finish the game with nine men.
Jones and Towell were dismissed and Warne's side battled bravely before Webster's header wins it for the hosts. #rufc pic.twitter.com/PDYUyQqp7A
Former Dundalk man Richie Towell saw red as Rotherham fell to a 1-0 loss against Bristol City at Ashton Gate.
Billy Jones and Towell were both sent off before Adam Webster struck the winner four minutes from time, dropping the Millers into the relegation zone.
Aston Villa were also frustrated at Preston, drawing 1-1 after Ahmed Elmohamady's own goal cancelled out Tammy Abraham's 14th strike of the season.
Graham Burke started for the Liylhwites, who were without Alan Browne due to a hamstring injury. And Cork teenager Adam O’Reilly made his senior debut off the bench, replacing his fellow Irishman Burke.
"His hamstring felt tight in training yesterday so we didn’t risk him," boss Alex Neill said of Browne afterwards. "He is unlikely to be available for the next game because it’s such a quick turn around."
🙌 Congratulations to @pnefcacademy pair @Adam_o_reilly and @Ethanwalker_7 on making their first team debuts this afternoon! 👏 #pnefc pic.twitter.com/VPckeGfDzJ
— Preston North End FC (@pnefc) December 29, 2018
Norwich failed to make them pay, though, remaining three points behind after letting a lead slip twice in a 4-3 defeat to Derby at Carrow Road.
Ben Godfrey and Teemu Pukki had fired the Canaries 2-0 ahead inside 31 minutes only for Fikayo Tomori and Mason Mount to level prior to half-time.
Pukki made it 3-2 in the 81st minute but, after a brief delay for floodlight failure, Florian Jozefzoon and Jack Marriott struck at the end for the visitors.
A last-gasp Chris Brunt goal salvaged a 1-1 draw for 10-man West Brom at home to managerless Sheffield Wednesday.
A fifth-minute strike from Atdhe Nuhiu appeared to be putting Wednesday on their way to a third consecutive win under caretaker boss Lee Bullen but, having seen Jay Rodriguez sent off, Brunt struck.
A Jordan Hugill penalty and a Marcus Tavernier strike ensured Middlesbrough beat bottom-of-the-table Ipswich 2-0 at the Riverside.
Birmingham and QPR passed up the opportunity to make ground on the play-offs following goalless draws with Brentford and Reading respectively.
A 1-0 defeat at struggling Millwall saw Nottingham Forest slip six points off the play-offs, with Ryan Tunnicliffe's ninth-minute overhead kick sealing the points.
Bolton and Stoke played out a goalless draw, while Mike Van Der Hoorn denied Wigan the chance to end four consecutive defeats with a late equaliser for Swansea.
Joe Garner scored twice in the first half, the first from the penalty spot, but Dan Burn put through his own net and Van Der Hoorn levelled the game at 2-2 in the 81st minute.
