Fuming Preston boss Simon Grayson blasted Brentford's players after seeing his resurgent side lose to a "soft" injury-time penalty.
Bees winger Sam Saunders sealed the points that took his side to second spot when he sent keeper Declan Rudd the wrong way from the spot.
Saunders got up to convert the penalty after being sandwiched by former Brentford player John Mousinho and striker Stuart Beavon in a moment of madness in the visitors' box.
But an angry Grayson raged: "It was very disappointing to lose to a soft penalty like that particularly when there were one or two Brentford players going down quite easily. If that had been up the other end I doubt we'd have got it.
"We defended really well, had a good shape and dominated for large parts in the second half so we can be proud of the performance against a side that's near the top pushing for promotion."
Grayson's account of the game was disputed by Bees boss Uwe Rosler, who pointed to the shot count of 23 against six as evidence of the Londoners' dominance.
"The only way I thought we could lose that game was through our own fault," said the German, who changed his side's style to match the Lillywhites' more robust approach.
"Preston are a different team under Simon but it was a definite penalty. If you keep working, keep the tempo up and have the kind of desire we had then the percentages of getting a decision like that increase."
The win sets Brentford up for a mouthwatering televised clash at Sheffield United next weekend when Rosler will be looking for an improvement on the last time his side visited Bramall Lane.
He said: "I asked the players after this game what the good news was and they said 'we won'. They couldn't tell me the bad news so I told them, 'we're second'. Every game will be like a cup final for us now but first I want to see how far we've progressed since the last time we went to United and lost comfortably."