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findCirclesGrid unstable row order

I'm trying to use findCirclesGrid but it appears to switch the ordering of the points that it returns to me randomly:

correct order

weird order

I'm generating the positions going into drawChessboardCorners as described on OpenCV's camera calibration page

This is running through ROS groovy's latest version on 12.04, using OpenCV 2.4.6.1. I'm having no problem with findChessboardCorners

findCirclesGrid unstable row order

I'm trying to use findCirclesGrid but it appears to switch the ordering of the points that it returns to me randomly:

correct order

weird order

I'm generating the positions going into drawChessboardCorners as described on OpenCV's camera calibration page

This is running through ROS groovy's latest version on 12.04, using OpenCV 2.4.6.1. I'm having no problem with findChessboardCorners