In the attached html, the <span></span> element is absolute positioned, without left and right properties. It is right text aligned. In some of the browsers it appears in left, in some it is in right.
Created attachment 191717 [details] position absolute - right aligned element
Created attachment 191718 [details] Different browsers view
Safari, Chrome, and Firefox all agree on rendering for this test case. I don't believe there is any remaining compatibility issue.