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I used to have MathJax rendering MO math using my local stix fonts. For a while now, though, I'm stuck with PNGs, which are not that great.
Anyone knows how would one go about debugging the situation?
Remove and reinstall your STIX fonts? You probably need to say which OS and browser you're using.
This is Fedora 13, with the system STIX fonts installed by yum, using Firefox. Everything up-to-date (apart form the fact that this is not F14...)
Did you try forcibly reinstalling the STIX fonts? e.g.
sudo yum remove stix-fonts
sudo yum install stix-fonts
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