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For example, when I write \vec{a}, I see (to be clear, the following is a screenshot):

$\hskip3in$ enter image description here

To facilitate comparison, here is \vec{a} compiled by the website: $$\vec{a}$$

I'm currently using Chrome 17.0.963.56 m on Windows XP SP3 (I'm using an old laptop today). I tested it out on my phone (!) and \vec works fine, though. But I figure enough people are still using XP that it's worth mentioning this issue.

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  • $\begingroup$ Font problem maybe? Refreshed cache? $\endgroup$ – Willie Wong Mar 5 '12 at 9:14
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It turns out that Chrome on Windows XP can't access four accents from the web fonts used by MathJax. These are the combining arrow above (U+20D7), the combining dot above (U+0307), combining double acute accent (U+030B), and the combining long solidus overlay (U+0338). The other browsers on XP (or any other platform) have no trouble with these, so I don't think it is a problem with the font. Historically, Chrome on XP has had some problems with the web fonts with a few characters being inaccessible (a "T" in one font, a "d" and ">" in another, and several others).

I may be able to work around these four, but that likely won't be available until the next release of MathJax. A quick check suggests that these are the only problems in the current version of Chrome on XP.

For now, you can try switching to SVG output (right-click on an equation to get the MathJax contextual menu, and use the "Math Settings" then the "Renderer" menu to select "SVG").

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  • $\begingroup$ fyi: vec does work in XP SP3, Chrome 5.0375.99 (old laptop) $\endgroup$ – Bill Dubuque Mar 10 '12 at 3:20
  • $\begingroup$ FYI: Still seeing this problem with Chrome 21.0.1180.75 and XP SP3. $\endgroup$ – I. J. Kennedy Aug 24 '12 at 23:38

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