I have the same problem and some others:(
None of my color sections with fixed images work perfectly on the iPad. (They look very good on my PC though..) I am using the full width of the screen and have stretched the images to fit.
Here for instance, the image is repeated instead of stretched on the iPad: http://lystilditthus.no/om-marie-anisdahl-side/
Here, the color block doesn’t show on the iPad, at least not as I am writing this: http://lystilditthus.no/for-profesjonelle/
And, this is maybe typical for responsive sites – the image segment shown on the iPad is very different from the image segment shown on bigger screens – and on the iPad some of my images become really uninteresting:( – if you have a solution to this, please tell me:
http://lystilditthus.no/for-privatpersoner/
Thank you,