TeX4ht needs .eps format of
the figure since it works with dvips graphics driver and hence cannot
accept any other graphics file format.
I use png and jpg with tex4ht all the time. tex4ht.env has rules to
convert them on the fly (highly problematic in itself, but anyway).
I see a rule in tex4ht.env for svg using dvips (??) and then pstoedit.
Maybe that is what failed for Nasser, or maybe it never got run. (It is
darn hard to figure out what parts of tex4ht.env are executed on any
given run, so far as I've ever been able to discern. Maybe I am missing
it in the logs ...)
k
