I am opennig old tipic: http://wordpress.org/support/topic/virtue-drop-down-menu-font-size?replies=5#post-5040527
I have same problem with custom drop down menu. I changed background color and tried change color of A (link). There is one bug and I dont know, how to fix it. When I open drop down menu, font goes bold and in a half of second goes back to normal. This changing makes me crazy :-(
I heard, that Virtue uses superfish menu, but I cant find css file in folder od theme.