What problems do happen? MathML shouldn't be used unless you explicitly
use the "mathml" option. There are some notorious issues with sub and
super scripts with the MathML option, TeX4ht needs to enclose the base
and exponent in {} in order to work correctly, for example. I am sure
there are many more problems.
Best regards,
Michal
Thanks. Removing the mathjax option does indeed remove the two
redundant script elements relating to MathJax from the output HTML
files, although using MathML seems to cause other problems that I need
to investigate further.
Best wishes, Francis