Second half goals from Shefki Kuqui and on loan Adam Proudlock were enough to give Chris Turner's men three valuable points.
Finnish striker Kuqi broke the deadlock after 67 minutes and Proudlock sealed the win with the second on the stroke of the final whistle to stun the home side.
Leicester's attempts to close the gap on leaders Portsmouth were thwarted as their game at Reading was abandoned at half time because of adverse weather conditions with the game only going ahead initially after a pitch inspection at The Madejski Stadium.
Stoke recorded their second successive win with an impressive 2-1 win over Preston at the Britannia Stadium.
Brynjar Gunnarsson fired the home side in front two minutes before the break and Dutch winger Peter Hoekstra doubled the lead right on the half time whistle.
Pawel Abbott pulled one back for North End in the last minute but it proved to be nothing more than a consolation as Stoke took all three points.
Ipswich continued their recent good form with a convincing 4-1 over Millwall at Portman Road.
Tommy Miller fired the home in front after 57 minutes, but Steven Reid levelled things up seven minutes later.
Jermaine Wright restored Ipswich's lead 15 minutes from time and Marcus Bent ensured the win with the third after 79 minutes.
Miller added his second and his side's fourth goal from the penalty spot three minutes from time to cap a good win for Joe Royle's troops.
Crystal Palace and Coventry shared the spoils after a 1-1 draw in the battle of the two in-form sides at Selhurst Park.
Gary McSheffrey fired the visitors in front after 69 minutes but the lead only lasted three minutes as substitute Ade Akinbiyi replied for Palace with his first goal since last April.
Walsall earned a valuable point with a credible 1-1 draw with Nottingham Forest at The City Ground.
John Thompson's first senior goal gave the home side the lead after 15 minutes, but on-loan winger Gareth Ainsworth drew the visitors level in the 63rd minute.
Paul Ince's first goal for Wolves earned Dave Jones' troops a 1-1 draw with Derby at Molineux.
Malcolm Christie's first goal in ten games gave the visitors a shock lead on 15 minutes, but Ince levelled things up in the 66th minute to take some of the pressure off Jones.
Portsmouth continued their march towards the Premiership with a 2-2 draw against Watford at Vicarage Road.
After a lacklustre first-half, the game burst into life after the interval. The Hornets came out all guns blazing and took a deserved lead when Micah Hyde tapped home Jermaine Pennant's cross.
The goal inspiried the visitors who struck back with vengence. Firstly Deon Burton turned home Nigel Quashie's deflected cross and just moments later Kevin Harper made Alec Chaimberlain pay for a poor goal-kick.
However, it was not enough to see off the home side, who thoroughly deserved a share of the spoils, when full-back Neil Cox ghosted into the box to head home from close-range.
Click on fixture for full match summary:
Brighton P-P Wimbledon
Crystal Palace 1-1 Coventry
Grimsby P-P Bradford
Ipswich P-P Millwall
Nott`m Forest 1-1 Walsall
Reading v Leicester (match abandoned at half time)
Rotherham 0-2 Sheff Wed
Sheff Utd P-P Burnley
Stoke 2-1 Preston
Watford 2 Portsmouth 2
Wolves 1-1 Derby
Click here for updated league table
