Tests ----- http://www.gtalbot.org/BrowserBugsSection/CSS3WritingModes/text-orientation-014-mplus-1p-GT.xht http://www.gtalbot.org/BrowserBugsSection/CSS3WritingModes/text-orientation-mixed-vs-sideways-002.xht http://www.gtalbot.org/BrowserBugsSection/CSS3WritingModes/text-orientation-mixed-vs-sideways-004.xht Expected results ---------------- In text-orientation-014-mplus-1p-GT.xht, both rectangles should be identical In text-orientation-mixed-vs-sideways-002.xht, a) should be identical to b) In text-orientation-mixed-vs-sideways-004.xht, c) should be identical to d) Actual results -------------- The height of the first (and only first) line box is increased; it is increased by 30% in Ahem-based tests. Sideways-ed glyphs are also offset by 30% (baseline difference 0.5 - 0.2). Explanations ------------ Right now, it would be difficult for me to explain or justify the expected results. In http://lists.w3.org/Archives/Public/public-css-testsuite/2015Dec/0010.html Koji Ishii states "Slight differences in baseline position can be possible" but I would not be able to explain why. Notes ----- - I get expected result with Firefox 42.0 buildID=20151030084315 for all 3 test pages - Chrome 48.0.2564.22 passes all 3 test pages - I am using Firefox 45.0a1 buildID=20151208030212 - I use Linux 3.16.0-71-generic x86_64, Qt: 4.8.6, KDE 4.14.3; Kubuntu (trusty) 14.04.03 LTS - I've searched for duplicates and did not find any.