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I think i see the problem here. Through my own trials i observed that the symptoms you are describing occur when the image has not yet been received by the calibration gui node. It doesn't draw any images until it's received an image.
It looks like you're remapping the incorrect topic, which would explain why the image has not been received.
rosrun camera_calibration cameracalibrator.py --size 9x6 --square 0.05 images:=/camera/image_raw camera:=/camera is remapping "images" and should be remapping "image". You can check this by comparing the subscribed topics under rosnode info /camreacalibrator to the topics viewable by rostopic list
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