{"action":"created","issue":{"url":"https://api.github.com/repos/mathjax/MathJax/issues/1033","labels_url":"https://api.github.com/repos/mathjax/MathJax/issues/1033/labels{/name}","comments_url":"https://api.github.com/repos/mathjax/MathJax/issues/1033/comments","events_url":"https://api.github.com/repos/mathjax/MathJax/issues/1033/events","html_url":"https://github.com/mathjax/MathJax/issues/1033","id":56119308,"number":1033,"title":"Math Processing Error","user":{"login":"PeterLuschny","id":876830,"avatar_url":"https://avatars.githubusercontent.com/u/876830?v=3","gravatar_id":"","url":"https://api.github.com/users/PeterLuschny","html_url":"https://github.com/PeterLuschny","followers_url":"https://api.github.com/users/PeterLuschny/followers","following_url":"https://api.github.com/users/PeterLuschny/following{/other_user}","gists_url":"https://api.github.com/users/PeterLuschny/gists{/gist_id}","starred_url":"https://api.github.com/users/PeterLuschny/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/PeterLuschny/subscriptions","organizations_url":"https://api.github.com/users/PeterLuschny/orgs","repos_url":"https://api.github.com/users/PeterLuschny/repos","events_url":"https://api.github.com/users/PeterLuschny/events{/privacy}","received_events_url":"https://api.github.com/users/PeterLuschny/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/mathjax/MathJax/labels/Accepted","name":"Accepted","color":"48ab4e"},{"url":"https://api.github.com/repos/mathjax/MathJax/labels/In%20Development","name":"In Development","color":"e8c32e"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-01-31T09:30:43Z","updated_at":"2015-01-31T15:59:07Z","closed_at":null,"body":"Hi!\r\n\r\n    \\begin{equation}\r\n    \\sum_{k=0}^n (-1)^k \\genfrac < > {0pt}{}{n}{k} = \\frac{4^{n+1}-2^{n+1}}{n+1} B_{n+1},\r\n    \\end{equation}\r\n\r\nworked until yesterday, today we have\r\n\r\n    <math xmlns=\"http://www.w3.org/1998/Math/MathML\" display=\"block\">\r\n      <merror>\r\n        <mtext>\\begin{equation}\r\n    \\sum_{k=0}^n&#xA0;(-1)^k&#xA0;\\genfrac&#xA0;&lt;&#xA0;&gt;&#xA0;{0pt}{}{n}     {k}&#xA0;=&#xA0;\\frac{4^{n+1}-2^{n+1}}{n+1}&#xA0;B_{n+1},\r\n    \\end{equation}</mtext>\r\n      </merror>\r\n    </math>\r\n\r\nRegards\r\nPeter Luschny\r\n"},"comment":{"url":"https://api.github.com/repos/mathjax/MathJax/issues/comments/72323281","html_url":"https://github.com/mathjax/MathJax/issues/1033#issuecomment-72323281","issue_url":"https://api.github.com/repos/mathjax/MathJax/issues/1033","id":72323281,"user":{"login":"dpvc","id":432782,"avatar_url":"https://avatars.githubusercontent.com/u/432782?v=3","gravatar_id":"","url":"https://api.github.com/users/dpvc","html_url":"https://github.com/dpvc","followers_url":"https://api.github.com/users/dpvc/followers","following_url":"https://api.github.com/users/dpvc/following{/other_user}","gists_url":"https://api.github.com/users/dpvc/gists{/gist_id}","starred_url":"https://api.github.com/users/dpvc/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dpvc/subscriptions","organizations_url":"https://api.github.com/users/dpvc/orgs","repos_url":"https://api.github.com/users/dpvc/repos","events_url":"https://api.github.com/users/dpvc/events{/privacy}","received_events_url":"https://api.github.com/users/dpvc/received_events","type":"User","site_admin":false},"created_at":"2015-01-31T15:59:07Z","updated_at":"2015-01-31T15:59:07Z","body":"@CharlesAnifowose, do you mean `2.4-latest` rather than `2.2-latest`?  I'm not sure the reason to go back that many versions.  Also, can you try `2.5-latest` and see if that helps?  If it is, indeed, a caching issue, that would resolve it while still giving you the improvements from 2.5.\r\n\r\n@PeterLuschny, I have figured out the issue in your case, and it is a bug in v2.5.  There were changes to `\\genfrac` to get the sizing of the delimiters right, and the conversion of the delimiters to their unicode values was being done too early for the new arrangement.  Here is a temporary fix for now until we push an update.  Add the following\r\n\r\n``` html\r\n<script type=\"text/x-mathjax-config\">\r\nif (MathJax.version === \"2.5.0\") {\r\n  MathJax.Hub.Register.StartupHook(\"TeX AMSmath Ready\",function () {\r\n    var TEX = MathJax.InputJax.TeX,\r\n        TEXDEF = TEX.Definitions;\r\n    MathJax.InputJax.TeX.Parse.Augment({\r\n      GetDelimiterArg: function (name) {\r\n        var c = this.trimSpaces(this.GetArgument(name));\r\n        if (c == \"\") return null;\r\n        if (TEXDEF.delimiter[c]) return c;\r\n        TEX.Error([\"MissingOrUnrecognizedDelim\",\"Missing or unrecognized delimiter for %1\",name]);\r\n      }\r\n    });\r\n  });\r\n}\r\n</script>\r\n```\r\n\r\njust before the script that loads `MathJax.js` itself.  "}}