Table Formatting Problem in Firefox (not IE)

okay I've inserted every tag in every style I can think of and nothing seems to fix this table display in firefox. The right table in the main_body container just won't stay in the main table. Help anyone?

Here's the link:

http://get-hyphenated.com/joomla_templates/

here's my css:

/* CSS Document */

/* MAIN */
body {
margin-top:0;
margin-bottom:0;
text-align:center;
font-family:"Alor";
font-size:12px;
background-image:url(../images/bg.gif);
}
/* LINKS */
a:link,a:visited,a:active {
color: #896A30;
text-decoration: none;
}
a:hover {
color: #896A30;
text-decoration: none;
font-style:italic;
}
/* TEXT */
.menu_title_text {
font-weight:bold;
font-size:20px;
text-transform: capitalize;
vertical-align:text-bottom;
}

/* TABLES */

#whole {
margin-left:auto;
margin-right:auto;
width: 770px;
border-color: #755F3E;
border-left: 3px;
border-right: 3px;
border-top:0px;
border-bottom:0px;
border-style: outset;
}
#header {
background-image:url(../images/top_bg.jpg);
background-repeat:no-repeat;
width: 770px;
height:165px;
}
#menu {
background-image:url(../images/top_menu_bg.jpg);
background-repeat:no-repeat;
height:24px;
width: 770px;
}
#main_body {
background-image:url(../images/main_body_bg.jpg);
table-layout:fixed;
width:770px;
}
#lft_column {
width: 180;
}
#right_column {
width: 175;
}
#center {
width:396px;
padding-left: 3%;
padding-right: 3%;
}
#lft_box_title {
background-image:url(../images/lft_box_title.gif);
height:34px;
}
#lft_box_top {
background-image:url(../images/lft_box_top.gif);
width:175px;
height:25px;
}
#lft_box_middle, #right_box_middle {
background-image:url(../images/lft_box_middle.gif);
padding-left: 11%;
padding-right: 9%;
}
#news_box {
background-image:url(../images/lft_box_middle.gif);
padding-right: 8%;
}
#lft_box_bottom {
background-image:url(../images/lft_box_bottom.gif);
width:175px;
height: 29px;
}

#right_box_top {
background-image:url(../images/box_top.gif);
width:175px;
height:41px;
}
#right_box_bottom {
background-image:url(../images/box_bottom.gif);
width:175px;
height:39px;
}
#bottom_divider {
background-image: url(../images/bottom_seperator.jpg);
background-repeat:no-repeat;
height:23px;
}
#footer {
background-image:url(../images/main_body_bg.jpg);
}

 

#center { /* template_css.css (line 66) */
width:396px;
padding:0 3px;
}