Margin is not applied on all pages when margin-top and margin-bottom is used on body tag. The margin is applied and then pagination is applied. So the margin-top is seen in the first page and the margin bottom in the second page. The expected result would be for both margin-top and margin-bottom should be applied on each of the pages. Tested on Chrome Canary Version 27.0.1447.3 canary on Windows 7
Created attachment 194444 [details] Test page - paged-x-onroot-with-margin.html
<rdar://problem/13483608>