I've got the solution.

In my css file, I had the following.

#navMain ul li a, #navSupp ul li a, #navCatTabs ul li a {
text-decoration: none;
padding: 0em 0.5em;
margin: 0;
color: #ffffff;
white-space: nowrap;
}


I changed it to what Frank had in his and it worked. Frank's css file read:

#navMain ul li a {
margin:0;
padding: 0 5px 0 4px;
float:left;
color:#FFF;
text-decoration:none;

Thanks for the help frank!