Created attachment 8466530 [details] Actual results - note missing / User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:31.0) Gecko/20100101 Firefox/31.0 (Beta/Release) Build ID: 20140716183446 Steps to reproduce: Using OS X 10.9.4 with Firefox 31.0, Open http://changelog.ca/log/2008/07/01/writing_fractions_in_html View the rendering of this code: <sup>1</sup>⁄<sub>10</sub> The slash for the frasl entity won't be shown. Open the same underlying HTML in a different page, like http://jsfiddle.net/TGaQe/, and the bug goes away. Open http://changelog.ca/log/2008/07/01/writing_fractions_in_html in FireFox 29.0 on Linux Mint or in Ubuntu with FireFox 28.0 and the bug goes away. Assuming platform doesn't matter, this would suggest a bug was introduced some time after 29.0. Actual results: https://pbs.twimg.com/media/Bt9kGNRCcAIeaeS.png:large
> The slash for the frasl entity won't be shown. It's shown for me with both Firefox 31 and a nightly on Mac OS 10.9.4...
This has something to do with the font. The font rule used is: font-family: "Lucida Grande","Jamrul",Helvetica,Verdana,Arial,Tahoma,sans-serif; ( from 2011normal.css, line 253 ) Disabling this rule in the inspector causes the page to use helvetica instead, and the fraction looks correct. I've updated my fiddle with css that now reproduces the problem: http://jsfiddle.net/TGaQe/2/
(In reply to Boris Zbarsky [:bz] (On vacation Aug 5-18) from comment #1) > > The slash for the frasl entity won't be shown. > > It's shown for me with both Firefox 31 and a nightly on Mac OS 10.9.4... Puzzlingly, I can repro on Nightly on 10.9.4 ( MBAir 11', not a retina display ). See the attached gif, just disabling the font rule fixes it. bz - any interesting font settings on your system? Retina display?
No interesting font settings, but yes a retina display.
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