[Fixed]-Using local MathJax files with Django / Mezzanine

I would try moving the config parameter outside the static reference and see if that helps:

<script type="text/javascript"
  src="{% static "js/MathJax/MathJax.js" %}?config=TeX-AMS-MML_HTMLorMML">
</script>

I don’t know Django or Mezzanine, but if the static is what is encoding the URL characters, moving them outside might prevent that.