Hi Bill, > Maybe something in your local system must causing you trouble.
tex4ht now provides two native ways to involve MathJax. First one is using MathML, this method is basically the same as what you use. It can be requested using "mathml,mathjax" options. The second keeps LaTeX math unexpanded in the HTML file and uses MathJax to render it. It is requested using just "mathjax" option, without "mathml". The issue with the second method is that you can experience errors in both tex4ht and MathJax. On the other hand, you don't experience issues with wrong MathML produced by tex4ht, so it has both positives and negatives. Best regards, Michal
