Dunfermline climbed to the top of the Scottish Championship with a 2-1 win over promotion favourites Hearts on Friday.
Visiting goalkeeper Craig Gordon had little to do in the first half but was left to pick the ball out of his net four minutes into the second, after Dom Thomas' left-footed drive took a wicked deflection off Popescu to leave the Scotland stopper helpless.
Dunfermline doubled their lead five minutes later when Euan Murray lost his marker at a corner to head home at the near post, with Thomas providing the assist.
Popescu headed against the bar for a second time before Stephen Kingsley pulled one back with a glancing header six minutes from time, but it was no more than a consolation goal for Robbie Neilson's side.
The result lifts Dunfermline three points clear of Raith, who visit Inverness on Saturday and boast a better goal difference than the Pars, while Hearts are four points adrift of the new leaders.