The curse of Roots Hall struck again as Leeds dropped their first points of the season after a 0-0 draw at Southend.
The League One high-flyers went into the match looking to extend their eight-game winning League run.
Instead they were held to a draw by the Shrimpers to deny Simon Grayson's team their first ever win at Roots Hall, although they had the consolation of going a point clear of Charlton at the top of the table.
And Leeds had goalkeeper Shane Higgs to thank for the stalemate after he saved a Lee Barnard penalty midway through the second half.
Leeds enjoyed the better chances early on with fit-again striker Jermaine Beckford, Robert Snodgrass and Patrick Kisnorbo all having opportunities off target.
In League Two, Accrington secured a 2-1 win over Darlington thanks to Billy Kee's late winner.
The Northern Ireland striker had only been on the pitch six minutes when he headed home Luke Joyce's right-wing cross after 83 minutes to seal three points for Stanley.
It had looked like they had thrown it away in front of their biggest crowd of the season, 3228, supporting the club as they look to pay off a #300,000 tax bill by the end of October.
Captain Andy Procter had headed them into a 21st-minute lead, slotting home John Miles' left-wing cross. They then hit the woodwork four times in a first half they dominated.
However, they were made to pay on the hour when experienced Quakers striker Kevin Gall lobbed over Ian Dunbavin from 18 yards out. It looked like it would end as a draw before Kee popped up with the winner.
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