Follow-up Comment #1, bug #524 (project tex4ht): Thanks for the report. I am not sure why it doesn't produce error in $ or $$, but it is really advisable to use proper grouping for sub- and superscripts with TeX4ht.
Alternatively, you can use the "pic-align" option. It will produce images for align and few others environments, and it doesn't fail with errors. _______________________________________________________ Reply to this item at: <http://puszcza.gnu.org.ua/bugs/?524> _______________________________________________ Message sent via/by Puszcza http://puszcza.gnu.org.ua/