Slovenian Robert Koren finished from close range with 16 minutes remaining to hand Tony Mowbray´s side the advantage at Ashton Gate, but Orr tapped home in the 89th minute to snatch a vital point for City which takes them back above Watford.
Two late Andy Reid penalties (85 and 88) helped Charlton overcome Norwich 2-0 at The Valley and go third.
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