Coca-Cola League Two leaders Rochdale suffered a rare defeat as Notts County and Bournemouth kept their promotion bids firmly on track.
Dale's lead was cut to seven points as they were beaten 2-0 by play-off challengers Chesterfield thanks to penalties from Barry Conlon in the 68th and 83rd minutes.
County made it seven wins from nine in some style with a 5-0 victory over play-off chasing Bury.
Mike Edwards set the tone after four minutes but they had to wait until the 52nd minute for the second goal, scored by Craig Westcarr. Ben Davies (60), Lee Hughes (66) and Delroy Facey (81) added the gloss.
Bournemouth managed only one goal against Bradford, scored by Brett Pitman in the 41st minute, but that proved enough.
Rotherham's hopes of breaking into the top three suffered a blow as they were beaten 2-1 by Port Vale. Two goals in three minutes from Craig Davies (59) and Marc Richards (62) put Vale in control, and Josh Walker's 81st-minute free-kick did not significantly change the outcome.
Meanwhile, Aldershot drew 1-1 at Macclesfield, Dagenham & Redbridge boosted their play-off hopes with a 3-1 win over Accrington, Shrewsbury's slide continued with a 2-1 loss at Torquay and Simon Davey got off to a good start as manager of rock bottom Darlington as they made it two wins in a row at Burton.
Elsewhere, Cheltenham claimed a 1-0 win over Lincoln and Hereford were victorious, beating Barnet 2-1.
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