Stephen Carr threw himself at Vratislav Gresko's speculative 30-yarder after 77 minutes only to see the shot spin off his leg and nestle into the opposite corner.
Incredibly, the same thing happened to the same player as Freddie Ljungberg;s shot looped home at Highbury on our last away trip.
Blackburn just about edged it in terms of possession but our defence looked solid again and, at the other end, Robbie Keane and Helder Postiga were off target with our best chances.
"The game was very even in the first half when not much happened," said caretaker boss David.
"The game picked up in second half and we were sitting comfortably. Kasey Keller had to field a few shots but I didn't think we looked in terrible touble.
"Blackburn had a bit of a surge, we expected that with them being the home side, but the goal was, of course, very, very fortunate.
"I thought we defended well and we deserved a point at least."
David Pleat admits we've missed the goalscoring threat of Fredi Kanoute in recent weeks.
The French striker is closing in on a return after a spell of six weeks on the sidelines.
Fredi was in a rich vein of form when he damaged ankle ligaments in the last minute of our win at Leicester City on October 19.
He had just scored the winner at the Walkers Stadium to make it six goals in six games, seven in total.
"If Kanoute is fit then things are different," said caretaker boss David. "We have been without him now for a while now and when games are tight you miss the man that can get a goal from nothing."
It was a slow tempo first half, a bit sloppy and a bit sleepy but I thought after half-time it exploded a little. I thought we looked the more likely for 20 minutes but Blackburn came into it and what can I say, that's the second away game in succession we've conceded an away goal to lose the game and from the same player as well. You expect the home team to have a fair amount of the play when you come away but I thought at times we had as much o fthe play. I didn't think we were in terrible trouble. Our goalkeeper did well when called upon but unless you are a very, very good side in this league you don't go away expecting to win easily. You expect a hard game and half-way through the second half I thought we looked comfortable, we were going to get perhaps a draw or even snatch it.
We were solid, no question. The team was solid. They didn't get behind us once in the first half and Keller had a safe goal. In the second half he had to save a few shots and Dwight Yorke pulled away well. Blackburn got more crosses in and that was crucial.
Graeme Souness conceded a deflected goal might have been the only way his Blackburn side were going to beat Kasey Keller on Saturday.
In the end it took just that as Vratislav Gresko's 30-yarder deflected off Stephen Carr and left Kasey helpless as it spun inside the far post for the only goal of the game at Ewood Park.
"Kasey Keller made good saves at key times in the second half and that kept them in the game," said Rovers boss Souness. "Perhaps the way he was playing that was the only way we were going to beat him.
"We've had absolutely no luck this season whatsoever, either in play or what referees have decided what is correct or incorrect, or their linesmen.
"It's nice to have had a wee bit of luck and hopefully, that's us turned the corner and it's nice to have kept a clean sheet.
"First half, we were nervous, tentative, but in the second half, the crowd got behind us and we gathered a momentum. I think we deserved to win in the end."
David Pleat could only curse his luck as a deflected goal at Ewood Park cost us for the second successive away match.