This setting appears in the template_default/css/stylesheet.css
The original setting was 0.5em. I made the change and it had no effect. Being in the graphics business, we notice little things like that. No biggie, one more small item that I am going to forget about. Not worth the effort.
There does seem to be quite a few things that are very browser sensitive. It is going to be interesting when my site goes live.
Thanks!
H. Light
Florida