Created attachment 217808 [details] Test-case Setting -webkit-region-break-after on an element triggers a different margin handling around the break point than setting -webkit-region-break-before on the next sibling of the element. Namely, -webkit-region-break-before leads to the before margin of the element it is applied to being incorrectly discarded. In the attached file, all lorem ipsum paragraphs should have a yellow margins (actually the background of the region they flow into). When using region-break-before, the top margin is discarded (second heading, second paragraph)