The Tykes remain on 52 points after losing a game which saw Hull City go into second place.
The Tigers would have topped the league but Zoltan Gera scored for West Brom at Wolves to take the Baggies top.
In League One, Gary McAllister's Leeds lost 1-0 at Huddersfield but if their court action, starting today is successful then they could get back their 15 points and be just behind Swansea in the automatic promotion places. Former City loanees Paul Trollope's Bristol Rovers beat Richard Money's Walsall 1-0.
New in the Football League next season will be Aldershot Town. Having had to withdraw from the league in 1992, a new club was formed and Aldershot Town have worked their way up into the Football League after getting the result they needed tonight at Exeter City.