Burnley climbed to fourth in the Coca-Cola Championship after a first-half blitz saw them defeat Derby 3-0 at Turf Moor.
Kevin McDonald (6) volleyed Owen Coyle's Clarets into the lead and Martin Paterson (15, 23) struck twice to seal victory before the interval.
Fifth-placed Sheffield United needed James Beattie's 89th-minute penalty - following Alan Quinn's handball - to claim a 1-1 draw at Ipswich.
The hosts had taken the lead from the spot themselves in the 41st minute when Tommy Miller converted after Matt Kilgallon also handled.
Plymouth missed the chance to climb into the play-off places after Liam Dickinson's two late goals (78, 81) condemned them to a 2-1 defeat by Blackpool at Home Park.
Paul Gallagher (67) had earlier fired Argyle ahead from the edge of the area.
QPR are just a place behind the south-west club in eighth after their London derby with Crystal Palace ended goalless at Selhurst Park.
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