Steve Cotterill's side once again drew a blank in front of goal which, despite a decent display, left Forest open to the sucker punch, delivered by Miller on the hour mark as Cardiff maintained their promotion push.
The hosts end 2011 in rather a different position than they began it, with only Doncaster Rovers and Coventry City below them in the Championship.
Reaction to follow on Forest Mad.
Source: FOOTYMAD