wawatts,
I think font changes are ignored with HTML reports, so you are probably seeing the expected behavior. The help for the Set Report Font VI does mention up front that font settings source is ignored, but I think it could do a better job of explaining what that implies.
One of the NI AEs wrote an example (
Setting Font Size and Color in HTML Text Tables) that demonstrates how to control HTML table fonts by embedding font information in the table cells themselves along with the data.
A more elegant solution would be to define a stylesheet to define the default font for table cells, but there's no built-in support for that, so you'd have to write your HTML to file and parse it to make it happen. Try the example and see if it does the trick.
Regards,
John