http://www.w3.org/International/tests/tests-html-css/tests-direction-unicode-bidi/generate?test=13&format=html5 Notice "! is on top of W3C.
http://www.w3.org/International/tests/tests-html-css/tests-direction-unicode-bidi/generate?test=14&format=html5 also fails.
So does http://www.w3.org/International/tests/tests-html-css/tests-direction-unicode-bidi/generate?test=17&format=html5
Created attachment 116811 [details] demo It appears that this bug reproduces only when font-family: Ariel is specified.
Looks like a measure/render discrepancy, probably due to shaping differences between the two.
(In reply to comment #4) > Looks like a measure/render discrepancy, probably due to shaping differences between the two. Yeah. I'm thinking that it might be to do with font fallback because it only reproduces when we have font-family: Arial. Specifying Helvetica, for example, solves the bug.