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Try this: download OpenCV source, compile it and replace the opencv libraries(make a backup!) of ROS with the compiled libraries. It helped me with 32bit Ubuntu 12.04 and ROS Groovy.

In some other code, I had a problem that cv::findCirclesGrid was corrupting fpu stack and causing other parts of my code to fail. This happenned only when using OpenCV libraries of ROS. After replacing the OpenCV libraries, findCirclesGrid() worked and also calibration started to work! Colleagues with 32bit Ubuntu 12.10 or 64bit systems did not experience the same issues.

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