Wordpress Themes - WP Forum at BFA - [SOLVED] IE wraps last menu item

Why on Earth would Internet Explorer in XP wrap the last page menu or category menu item into two lines?
http://www.smilefortcollins.com/gfx/ie.png

Code:

body,html

{

background-color: #003366;

background-image: url(http://www.domain.com/gfx/blue_blend_background.jpg);

background-repeat: repeat-x;

}

#middle {

background-color: #c9ba9e;

background-image: url(http://www.domain.com/gfx/paper_background.jpg);

background-repeat: repeat;

}

#header {

background-color: #c9ba9e;

background-image: url(http://www.domain.com/gfx/paper_background.jpg);

background-repeat: repeat;

}

#pagebackground {

background-image: url(http://www.domain.com/gfx/navbar_background.jpg);

background-repeat: repeat;

}

#catbackground {

background-image: url(http://www.domain.com/gfx/navbar_background.jpg);

background-repeat: repeat;

}

div#menu1 {

background: transparent !important;

border: transparent !important;

}

div#menu1 ul.rMenu li a {

background-image: url(http://www.domain.com/gfx/navbar_background_dark.jpg);

background-repeat: repeat;

border-top: solid 1px #b0a28a !important;

border-right: solid 1px #b0a28a !important;

border-left: solid 1px #cec0a9 !important;

border-bottom: solid 1px #cec0a9 !important;

padding: 10px;

}

div#menu2 {

background: transparent !important;

border: transparent !important;

}

div#menu2 ul.rMenu li a {

background-image: url(http://www.domain.com/gfx/navbar_background_dark.jpg);

background-repeat: repeat;

border-top: solid 1px #b0a28a !important;

border-right: solid 1px #b0a28a !important;

border-left: solid 1px #cec0a9 !important;

border-bottom: solid 1px #cec0a9 !important;

padding: 10px;

}

#pagecatarea {

        height: 67px;

}

img.floatNavLeft { 

        float: left;

        margin: 0px;

        padding: 0px;

}

img.floatNavRight { 

        float: right;

        margin: 0px;

        padding: 0px;

}