Bournemouth failed to take advantage of Rochdale's inactivity as they went down to a 1-0 defeat at Dagenham & Redbridge in Coca-Cola League Two.
The Cherries were hoping to go level on points with the leaders but a 39th-minute penalty awarded for Steve Fletcher's foul on Peter Gain was despatched by Mark Arber.
It was sufficient to give the hosts victory and take them to within three points of the play-offs.
Third-placed Bury went down to Chesterfield by the same scoreline as the Spireites drew to within three points of their visitors. Scott Boden scored the only goal of the game with a 58th-minute header.
Rotherham are fourth, three points behind the Shakers but with two games in hand and a superior goal difference after they beat Lincoln 2-1 at Sincil Bank.
Shrewsbury's 3-1 victory at home to Hereford sees them level on points with the Millers. The visitors took an early lead when Leon Constantine drilled a right-footed shot into the net after five minutes.
The lead lasted less than 10 minutes as Kelvin Langmead met Craig Disley's corner to head home and the game had turned round completely after 22 minutes when Shane Cansdell-Sherriff headed home Steven Leslie's free-kick from the left. Graham Coughlan sealed victory late on.
Darlington are 12 points from safety, and seemingly doomed to relegation, following their 20th defeat of the season at Morecambe.
Phil Jevons and Paul Mullin scored for the hosts who are firmly established in mid-table.
Grimsby are six points from safety following a 0-0 draw at Bradford. Cheltenham remain third-bottom after a 1-1 draw at Barnet and are on the same points as Torquay who went down 2-1 at home to Port Vale, while Macclesfield's match with Accrington ended goalless.
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