Menu text is now hidden until refresh

I modified the menu text to make it bigger using Firebug (code at the end)
and now sometimes when I load up the website
the menu text doesnt show up until I refresh the page
or move the mouse pointer over where the text should be…

Its “wpex photo child” theme

http://www.scorpion-dynamics.com

Any ideas ?

Thankyou

Calum

*/

@import url(“../wpex-photo/style.css”);

/* =Theme customization starts here
————————————————————– */
#navigation .sf-menu a {
color: #000000;
font-size: large;
height: 55px;
line-height: 55px;
text-decoration: none;
}