Browser-Bugs.md

+# Browser Bugs
+
+Browsers have several issues related to rendering of mathematical expressions
+or other features provided by MathJax. The most obvious one is the lack of a
+good [MathML support](MathML-Support-In-Browsers.md) but there are many other
+problems that MathJax tries to fix. However, adding specific workaround to each
+of the browser issue makes the MathJax code more complex and sometimes it may
+even not be possible to write such a workaround. Ideally all these bugs should
+be fixed upstream.
+
+This page lists some bugs that the MathJax team found in browsers as well as
+the corresponding report entries. The main goal is to keep track of these
+issues so that we can eventually remove them once the bugs are fixed in the
+browsers. This can also help us to answer questions about possible bugs on the
+MathJax user mailing list. Finally, this may also be an interesting resource for
+browser vendors and users.
+
+## Internet Explorer
+
+* <del>Entity definitions for characters are not up-to-date. See
+[feedback 674766](https://connect.microsoft.com/IE/feedback/details/674766/)
+</del> (Fixed in Internet Explorer 10).
+
+## Firefox
+
+[MathJax Tracking Bug](https://bugzilla.mozilla.org/show_bug.cgi?id=745687)
+
+* Firefox rendering problems following full-width math
+  See [issue 231](https://github.com/mathjax/MathJax/issues/231)
+
+* printing pages with downloadable fonts doesn't render all fonts on the page
+  See [bug 468568](https://bugzilla.mozilla.org/show_bug.cgi?id=468568)
+
+* [MathML bugs](https://bugzilla.mozilla.org/show_bug.cgi?id=687809)
+
+  * Support for the 'mathvariant' attribute
+  See [bug 114365](https://bugzilla.mozilla.org/show_bug.cgi?id=114365)
+
+  * Allow downloading math fonts / bundle math fonts with Firefox for better
+  MathML experience.
+  See [bug 295193](https://bugzilla.mozilla.org/show_bug.cgi?id=295193).
+
+  * Add support for mtable@rowspacing/columnspacing attributes
+  See [bug 330964](https://bugzilla.mozilla.org/show_bug.cgi?id=330964).
+
+  * rendering of mtable with a columnalign attribute is sometimes incorrect.
+  See [bug 491384](https://bugzilla.mozilla.org/show_bug.cgi?id=491384).
+
+  * Improve MathML linebreaking.
+  See [bug 534962](https://bugzilla.mozilla.org/show_bug.cgi?id=534962).
+  
+  * Improve/Complete implementation of maction. 
+  See [bug 544036](https://bugzilla.mozilla.org/show_bug.cgi?id=544036).
+  Note: MathJax supports maction but is such an element generated by an input
+  processor other than MathML?
+
+  * mpadded: height/depth should apply to logical metrics.
+  See [bug 685628](https://bugzilla.mozilla.org/show_bug.cgi?id=685628).
+
+  * Base of munderover not stretched.
+  See [bug 687807](https://bugzilla.mozilla.org/show_bug.cgi?id=687807).
+
+  * Add support for mlabeledtr.
+  See [bug 689641](https://bugzilla.mozilla.org/show_bug.cgi?id=689641).
+
+  * Problems printing MathML when @font-face is used.
+  See [issue 137](https://github.com/mathjax/MathJax/issues/137) and
+  [bug 697053](https://bugzilla.mozilla.org/show_bug.cgi?id=697053).
+  
+  * <del>too much space between upright mi elements.
+  [bug 320294](https://bugzilla.mozilla.org/show_bug.cgi?id=320294)</del>
+  (fixed in Firefox 13).
+
+  * <del>mlabeledtr is not shown at all. See
+  [bug 356870](https://bugzilla.mozilla.org/show_bug.cgi?id=356870)</del>
+  (fixed in Firefox 9).
+  MathJax workaround: remove the label and convert mlabeledtr to mtr.
+  (removed in MathJax 2.0)
+
+  * <del>mpadded: add support for the voffset attribute. See
+  [bug 557474](https://bugzilla.mozilla.org/show_bug.cgi?id=557474)</del>
+  (fixed in Firefox 7).
+
+  * <del>Names for negative spaces are not supported. See
+  [bug 650530](https://bugzilla.mozilla.org/show_bug.cgi?id=650530)</del>
+  (fixed in Firefox 7).
+
+  * <del>Support for attribute "width" on mtable. See
+  [bug 722880](https://bugzilla.mozilla.org/show_bug.cgi?id=722880)</del>
+  (fixed in Firefox 13).
+  MathJax workaround: attach a "style" attribute to the mtable element.
+  See [issue 214](https://github.com/mathjax/MathJax/issues/214)
+
+## Webkit
+
+[MathJax Tracking Bug](https://bugs.webkit.org/show_bug.cgi?id=84012)
+
+* Safari/Chrome: &notinE; and &notindot; are not supported.
+  See [bug 62187](https://bugs.webkit.org/show_bug.cgi?id=62187) and
+  [bug 43949](https://bugs.webkit.org/show_bug.cgi?id=43949#c39). Not tested
+  with Konqueror yet.
+
+* Chrome 18 messes up the Show As window
+  See [issue 221](https://github.com/mathjax/MathJax/issues/221)
+
+* -webkit-column-count crashes Mathjax in Chrome
+  See [issue 45](https://github.com/mathjax/MathJax/issues/45) and
+
+* Positioning error in dynamically inserted content 
+  See [bug 50210](https://bugs.webkit.org/show_bug.cgi?id=50210)
+
+## Opera
+
+* &lang; and &rang; are not mapped to the right unicode characters. Bug report
+  ID is DSK-343994.
+