Two Grey/white bands on site? need to be removed or changed to black?

Hi, I have just changed the theme from original parent to child theme - see http://tinyurl.com/osp8tmp . as a result there are now some white stripes on the top and bottom of the page which have appeared. not sure why.
Would it be possible to see if they can be removed? either through CSS ? or another way please?

(seems to affect all pages) + some pages affects more area than just strips

Domain: http://tinyurl.com/kl7grg3
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(please dont post any Images / Brand / Domain links etc here please use
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Thanks

Tom