Chris Dagnall's bundled effort handed Scunthorpe a dogged 1-0 victory over in-form Nottingham Forest and a first npower Championship win at Glanford Park since August.
The 24-year-old put the Iron on course to their first win in 2011 by clattering home from close range under pressure from Forest full-back Chris Gunter.
Defeat for promotion-chasing Forest curtailed their 10-match unbeaten run and saw them miss the chance to move into second place.
The visitors missed a plethora of chances either side of the break and came closest through substitute Dele Adebola, whose header rattled the bar in the 74th minute.
The original clash at Glanford Park was postponed in December due to the icy conditions and the tough winter was still evident in north Lincolnshire, with the pitch looking worse for wear.
Both sides struggled to adapt to the conditions during the opening exchanges and it took 15 minutes for either side to carve out a clear opening, with Dagnall heading over Mark Duffy's right-wing cross for the hosts.
In the 19th minute, Duffy played the ball out wide to Middlesbrough loanee Lee Miller, whose low cross from the right was bundled home by Dagnall under pressure from full-back Gunter inside the six-yard box.
The goal - only United's third in eight league matches - was almost followed up immediately by another, but Lee Camp saved well from Josh Wright's 20-yard effort.
The scoreline belied the first-half action and Forest continued to dominate proceedings after the break, with Marcus Tudgay's goalbound shot blocked shortly after the restart.
In a bid to change the attacking dynamics and path of the game, Forest boss Billy Davies brought on McGoldrick and Adebola midway through the second half and the Scot's move almost paid dividend in the 74th minute when the latter stooped in to header Gunter's cross onto the bar.
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