Menu images dropping down a little to low?

Menu images dropping down a little to low?

You can view the page in question here: http://portal.envisionlocal.com
Basically the image menu-sep.png which acts as a line break between the
different menus in my header is dropping down just a fraction below the
navigation bar and I can't figure out what to do to fix that. I'd prefer
to fix it inline instead of in a CSS file because the only solution to
fixing in the CSS file that I've found is editing line 52 of flex.css:
I changed
font: 13px/1.6em "Open Sans",Arial,sans-serif;
to
font: 11px/1.6em "Open Sans",Arial,sans-serif;
and it fixed the problem but also made all of the other text on the page
way too small - it didn't change the text size in the header but did fix
the problem for some reason...
Any help would be appreciated! Thanks!