How to adjust letter sizing in the menu-header div for viewing in IPhone.

Hi.

I started to test my new site (was based on TwentyTen theme) and while testing on IPhone, came across this problem: the last page link (along with its vertical-link-divider image) from my header menu is pushed under the menu itself. I figure it is because the menu letters size stayed the same in the IPhone viewing window. Or is the anything else I am missing. How to fix this problem?? Does anyone know? Thanks for any input.
Below is the CSS for my menu:

#access {
    background: url("images/menu_bg.png") no-repeat scroll 0 0 transparent;
    display: block;
	float: right;
    width: 563px;
	height: 53px;
    margin: 34px auto 0 auto;
}
#access .menu-header,
div.menu {
	font-size: 18px;
	text-transform: uppercase;
	margin-left: 2px;
	width: 563px;
}
#access .menu-header ul,
div.menu ul {
	list-style: none;
	margin: 0;
}
#access .menu-header li,
div.menu li {
	float: left;
	position: relative;
}
#access a {
	color: #fff;
	display: block;
	line-height: 53px;
	padding: 0 28px;
	text-decoration: none;
}
#access ul ul {
	box-shadow: 0px 3px 3px rgba(0,0,0,0.2);
	-moz-box-shadow: 0px 3px 3px rgba(0,0,0,0.2);
	-webkit-box-shadow: 0px 3px 3px rgba(0,0,0,0.2);
	display: none;
	position: absolute;
	top: 53px;
	left: 2px;
	float: left;
	width: 180px;
	z-index: 99999;
}
#access ul ul li {
	min-width: 180px;
}
#access ul ul ul {
	left: 100%;
	top: 0;
}
#access ul ul a {
	background: #F84E10;
	line-height: 1em;
	padding: 10px;
	width: 160px;
	height: auto;
}
#access li:hover > a {
	color: #fff;
}
#access ul ul :hover > a {
	background: #F58B41;
	color: #fff;
}
#access ul li:hover > ul {
	display: block;
}
#access .menu-header li, div.menu li
 {
 float: left;
 position: relative;
 background-image:
 url(images/ver.png);
 background-repeat: no-repeat;
 }
 div.menu li:first-child
 {
 background:none;
 }