Bug in Firefox? White space at the bottom of my site

[Ludatha]

For some bizzar reason my site works fine with IE but not in Firefox...

http://www.ludatha.com/test/index.php

In Firefox there is a white space at the bottom of every page. It is 13px high.
It doesn't appear in IE

My Layout CSS:

/****************************************************************/
/*   Design:   Ludatha - Dark                                   */
/*   File:     Grid Toolbox                                     */
/*--------------------------------------------------------------*/
/*   Design:   design.ludatha.com                               */
/*   Date:     Febuary 11, 2008                                 */
/*--------------------------------------------------------------*/
/*   Copyright: Copright to Ludatha Ltd. All Rights Reserved    */
/****************************************************************/

/******************/
/* GLOBAL LAYOUT  */
/******************/

 body {font-size:62.5%; background-color:#0c0c0c; background-image:url(../img/bg.gif); font-family:arial,sans-serif;} /*Font-size: 1.0em = 10px when browser default size is 16px*/
.container {width:1012px; padding-top:0px; padding-bottom:0px; margin:0 auto; font-size:1.0em;}
.header {width:1012px; min-height:130px /*Non-IE6*/; height:auto !important /*Non-IE6*/; height:130px /*IE6*/; border-left:solid 1px rgb(200,200,200); border-right:solid 1px rgb(200,200,200); background:rgb(225,225,225) url(../img/bg_header.jpg) repeat-x /*Total header background image entered here. Height: 125px*/; font-size:1.0em;}
.header-top {clear:both; width:1012px; height:174px; background:rgb(218,218,218) url(../img/header-bg.gif) /*Top header background image entered here. Height: 100px*/; font-size:1.0em;}
.header-bottom {clear:both; width:1012px; min-height:30px /*Non-IE6*/; height:auto !important /*Non-IE6*/; height:30px /*IE6*/; background:rgb(225,225,225) url(../img/ad-bg.gif) repeat-x /*Bottom header background image entered here: Height: 25 px*/; font-size:1.0em;}
.navbar {white-space:nowrap /*IE hack*/; float:left; width:1012px; height:32px; border-left:solid 1px rgb(200,200,200); border-right:solid 1px rgb(200,200,200); background:rgb(225,225,225) url(../img/nav-bg.gif); font-family:tahoma,arial,sans-serif; font-size:130% !important /*Non-IE6*/; font-size:120% /*IE6*/;} /*Color navigation bar normal mode*/
.main {clear:both; width:1012px; padding:0px 0 20px 0; border-left:solid 1px rgb(200,200,200); border-right:solid 1px rgb(200,200,200); background-color:#0c0c0c; font-size:1.0em;}
.content {
	display:inline; /*Fix IE floating margin bug*/
	padding:24px 24px 24px 24px;
	float:left;
	width:636px;
	background-color:#0c0c0c;
	background-position:24px 24px 24px 24px;
	font-size:1.0em;
	overflow:visible !important /*Non-IE6*/;
	overflow:hidden /*IE6*/;
}
.subcontent {display:inline /*Fix IE floating margin bug*/; float:right; width:328px; background-color:rgb(200,200,200); font-size:1.0em; overflow:visible !important /*Non-IE6*/; overflow:hidden /*IE6*/;}
.footer {clear:both; width:1012px; padding:1.0em 0 1.0em 0; border-left:solid 1px rgb(200,200,200); border-right:solid 1px rgb(200,200,200); background-color:rgb(225,225,225); font-size:1.1em !important /*Non-IE6*/; font-size:1.0em /*IE6*/; overflow:visible !important /*Non-IE6*/; overflow:hidden /*IE6*/;}

/****************/
/*  HEADER-TOP  */
/****************/

/* Sitename and slogan */
.sitelogo {width:70px; height:70px; position:absolute; z-index:1; margin:15px 0 0 15px; background:url(../img/bg_logo.gif);}
.sitename {width:300px; height:70px; position:absolute; z-index:1; margin:27px 0 0 95px; overflow:hidden;}
.sitename h1 {font-family:"trebuchet ms",arial,sans serif; font-weight:normal; font-size:290% !important /*Non-IE6*/; font-size:260% /*IE6*/;}
.sitename h2 {font-family:verdana,arial,sans serif; margin-top:-5px; padding-bottom:2px; color:rgb(125,125,125); height:20px; font-weight:normal; font-size:130% !important /*Non-IE6*/; font-size:120% /*IE6*/;}
.sitename a{text-decoration:none; color:rgb(125,125,125);}
.sitename a:hover {text-decoration:none;}

/* Button navigation */
.navbutton {width:600px; position:absolute; z-index:2; margin-top:13px; margin-left:547px !important /*Non-IE6*/; margin-left:550px /*IE6*/;}
.navbutton ul {float:right;}
.navbutton li {display:inline; list-style:none;}
.navbutton li a {padding-left:3px;}
.navbutton a:hover {text-decoration:none;}
.navbutton a img {height:32px;}

/* Global navigation */
.navglobal {width:600px; position:absolute; z-index:3; margin-top:65px; margin-left:349px !important /*Non-IE6*/; margin-left:351px /*IE6*/;}
.navglobal ul {float:right; font-weight:normal;}	
.navglobal li {display:inline; list-style:none;}
.navglobal li a {display:block; float:left; padding:2px 5px 2px 5px; color:rgb(125,125,125); text-decoration:none; font-size:130% !important /*Non-IE6*/; font-size:120% /*IE6*/;}
.navglobal a:hover {text-decoration:none; color:rgb(255,255,255);}

/*******************/
/*  HEADER BOTTOM  */
/*******************/

/* Breadcrumb */
.header-bottom ul {float:left; text-align:center; width:1012px; list-style:none; background-image: url(../img/celltitle_level1.gif);}
.header-bottom ul li {display:inline; padding:0 0 0 10px; background:transparent url(../img/bg_bullet_arrow.gif) no-repeat 0 50%; font-size:110% !important /*Non-IE6*/; font-size:100% /*IE6*/;}
.header-bottom ul li.nobullet {display:inline; padding:0; background:none; color:rgb(75,75,75);}
.header-bottom ul a {color:rgb(125,125,125); font-weight:bold; text-decoration:none;}
.header-bottom ul a:hover {color:rgb(255,255,255);}

/* Search form */
.header-bottom .searchform {float:right; width:430px;}
.header-bottom .searchform form fieldset {float:right; border:none; padding-top:5px; padding-right:1px;}
.header-bottom .searchform input.field {width:15.0em; height:1.2em; padding:1px !important /*Non-IE6*/; padding:2px /*IE6*/; border:solid 1px rgb(200,200,200); background-color:rgb(255,255,255); font-size:110% !important /*Non-IE6*/; font-size:100% /*IE6*/;}
.header-bottom .searchform input.button {width:4.5em; height:1.6em; background-color:rgb(240,240,240); border:solid 1px rgb(150,150,150); text-align:center; color:rgb(100,100,100); font-size:110% !important /*Non-IE6*/; font-size:100% /*IE6*/;}
.header-bottom .searchform input.button:hover {cursor:pointer; border:solid 1px rgb(80,80,80); background-color:rgb(220,220,220); color:rgb(80,80,80);}

/********************/
/*  NAVIGATION BAR  */
/********************/

/* Main menu */
.navbar ul {list-style-type:none; background:url(../img/nav-bg.gif); }
.navbar ul li {float:left; z-index:auto !important /*Non-IE6*/; z-index:1000 /*IE6*/; background:none; }
.navbar ul li a {float:none !important /*Non-IE6*/; float:left /*IE-6*/; display:block; height:32px; line-height:32px; padding:0 16px 0 16px; text-decoration:none; font-weight:bold; color:rgb(100,100,100); border-right:solid 0px rgb(215,215,215);}
.navbar ul li ul {display:none; border:none;}

/* Submenu (Non-IE6 hovering) */
.navbar ul li:hover {position:relative;} /*Sylvain IE hack*/
.navbar ul li:hover a {background-color:rgb(235,235,235); text-decoration:none;} /*Color main cells hovering mode*/
.navbar ul li:hover ul {display:block; width:10.0em; position:absolute; z-index:1000; top:2.4em; margin-top:0.1em; left:0; padding:0px 16px 0px 16px; border-top:solid 1px rgb(215,215,215);}
.navbar ul li:hover ul li a {white-space:normal; display:block; width:10.0em; height:auto; line-height:1.3em; margin-left:-17px; padding:4px 16px 4px 16px; border-right:solid 1px rgb(215,215,215); border-left:solid 1px rgb(215,215,215); border-bottom: solid 1px rgb(215,215,215); background-color:rgb(235,235,235); font-weight:normal; color:rgb(100,100,100);} /*Color subcells normal mode*/
.navbar ul li:hover ul li a:hover {background-color:rgb(225,225,225); text-decoration:none;} /*Color subcells hovering mode*/

/* Submenu (IE6 hovering) */
.navbar table {position:absolute; z-index:1000; top:0px; left:-1px; border-collapse:collapse;}
.navbar ul li a:hover {position:relative /*Sylvain IE hack*/; z-index:1000 /*Sylvain IE hack*/; background-color:rgb(235,235,235); text-decoration:none;} /*Color main cells hovering mode*/
.navbar ul li a:hover ul {display:block; width:10.0em; position:absolute; z-index:1000; top:3.1em; t\op:3.0em; left:0px; marg\in-top:0.1em; border-top:solid 1px rgb(215,215,215); }
.navbar ul li a:hover ul li a {white-space:normal; display:block; w\idth:10.0em; height:1px; line-height:1.3em; padding:4px 16px 4px 16px; border-right:solid 1px rgb(215,215,215); border-left:solid 1px rgb(215,215,215); border-bottom: solid 1px rgb(215,215,215); background-color:rgb(235,235,235); font-weight:normal; color:rgb(100,100,100);} /*Color subcells normal mode*/
.navbar ul li a:hover ul li a:hover {background-color:rgb(225,225,225); text-decoration:none;} /*Color subcells hovering mode*/

/*************/
/*  CONTENT  */
/*************/

/* Content cell (no subcells) */
.content-cell {width:636px; background-color:#dadada;}

/* Content cell + subcells (subcells are NOT in boxform)  */
.content-cell-nobox {width:676px; background-color:rgb(255,255,255);}
.content-subcell-left-nobox {display:inline; float:left; width:337px; border-right:solid 1px rgb(215,215,215) /*Use this statement if left column is longer than the right column. Activate by removing "xx_" from property name*/; background-color:rgb(255,255,255);}
.content-subcell-right-nobox {display:inline; float:right; width:337px; border-left:solid 1px rgb(215,215,215)/*Use this statement if right columnn is longer than the left column. De-activate by adding "xx_" to propery name*/; background-color:rgb(255,255,255);}

/* Content cell + subcells (subcells ARE in boxform) */
.content-cell-box {width:676px; background-color:transparent;}
.content-subcell-left-box {display:inline; float:left; width:333px; background-color:transparent;}
.content-subcell-right-box {display:inline; float:right; width:333px;  background-color:transparent;}
.content-subcell-cell-box {width:333px; background-color:rgb(255,255,255);}

/***************/
/* SUBCONTENT  */
/***************/

.subcontent-cell {width:328px; float:right; background-color:rgb(255,255,255);}

/************/
/*  FOOTER  */
/************/
.footer p {clear:both; line-height:0em; text-align:center; color:rgb(125,125,125); font-weight:bold; font-size:110%;}
.footer p.credits {clear:both; font-weight:normal;}
.footer a, .footer a:visited {text-decoration:underline; color:rgb(125,125,125);}
.footer a:hover {text-decoration:none; color:rgb(0,0,0);}

/*********************/
/*  ROUNDED CORNERS  */
/*********************/

/* Page */
.corner-top {width:978px; height:10px; background:transparent url(../img/bg_corner_top.gif) no-repeat; overflow:hidden;}
.corner-bottom {width:978px; height:10px; padding-bottom:20px; background:transparent url(../img/bg_corner_bottom.gif) no-repeat; overflow:hidden;}

/* Content */
.content-cell-corner-top {clear:both; width:676px; height:7px; background:white url(../img/content-top.png) no-repeat; overflow:hidden;}
.content-cell-corner-bottom {width:637px; height:29px; background:transparent url(../img/content-bottom.gif) no-repeat;}
.content-subcell-corner-top {width:333px; height:7px; background:transparent url(../img/bg_corner_content_subcell_top.gif) no-repeat; overflow:hidden;}
.content-subcell-corner-bottom {width:333px; height:7px; margin-bottom:0px; background:transparent url(../img/bg_corner_content_subcell_bottom.gif) no-repeat; overflow:hidden;}

/* Subcontent */
.subcontent-cell-corner-bottom {clear:both; width:328px; height:6px; margin-bottom:0px; background:transparent url(../img/bg_corner_subcontent_cell_bottom.gif) no-repeat; overflow:hidden;}

/******************/
/*  CLEAR FLOATS  */
/******************/
.container:after, .header:after, .header-top:after, .header-bottom:after, .navbar:after, .main:after, .content:after, .content div:after, .subcontent:after, .subcontent div:after, .footer:after {content:"."; display:block; height:0; clear:both; visibility:hidden;}
.content-cell:after, .content-subcell-left:after, .content-subcell-right:after, .content-subcell-cell:after, .content-cell-box:after, .content-subcell-left-box:after, .content-subcell-right-box:after, .content-subcell-cell-box:after, .subcontent-cell:after {content:"."; display:block; height:0; clear:both; visibility:hidden;}
.content-cell-corner-top:after, .content-cell-corner-bottom:after, .content-subcell-corner-top:after, .content-subcell-corner-bottom:after, .subcontent-cell-corner-top:after, .subcontent-cell-corner-bottom:after {content:"."; display:block; height:0; clear:both; visibility:hidden;}
 p:after {content:"."; display:block; height:0; /*clear:both; Do not use here to avoid paragraphs clearing next to images*/;  visibility:hidden;}
 
/**************/
/*  PRINTING  */
/**************/
/* To avoid that some layouts may break during printing */
/* we remove one vertical border-line for the subcells  */                 
@media print {.content-subcell-right-nobox {display:inline; float:right; width:337px; border-left:none; background-color:rgb(255,255,255);}}

How do I remove it?

[jcdevelopment]

what about adding to body

height:100%;

does that make a difference?

[Ludatha]

Originally Posted by jcdevelopment

what about adding to body

height:100%;

does that make a difference?

Nah, nothing changes, thanks for the input

[jlhaslip]

.main { padding-bottom:0; }

see if that works. it is currently at 20 px. firebug says it should work.
and consider making that div an id instead of a class? are there any others div's using the same css?

[Ludatha]

Nope, still happens...
I wouldn't be that annoyed if it was in IE, but Firefox... the only browser that actually works doesn't...

[harbingerOTV]

add:

overflow: hidden;

to your container. The content is floated and your not clearing your floats.

[Ludatha]

That didnt work, but I looked through the errors and all I had to do was remove
background-position:24px 24px 24px 24px;

It's fixed now