Ho un problema per quanto riguarda la parte grafica del mio sito ( http://harad.altervista.org ),praticamente ho revisionato un pò il css e provando le modifiche con l'ultima versione di opera sembrava tutto ok,poi provando con firefox ho notato che il background del div contenitore centrale non viene visualizzato perchè contiene a sua volta altri div.Potete vedere con vostri occhi cliccando sul link che ho postato,inoltre posto una parte del css e del template in modo che mi possiate aiutare meglio.

Parte del css:
Codice:
#maincol {
	width: 760px;
	background: url('../images/bg_parchment_fullwidth_720x167.gif') repeat-y top center;	
	color: #000;
	padding: 0;
	margin: 0 auto;	
	position: relative;
	top: 0;
	z-index: 10;
	clear:both;
}
#topbanner {
	clear:both;
	padding: 0;
	margin: 0 auto;	
	width: 760px;
	height: 88px;
	background:url('../images/scroll_header_760x88.gif') no-repeat top center;
	position: relative;
}
#foot {
	clear:both;
	padding: 0;
	margin: 0 auto;
	width: 760px;
	height: 83px;
	background: url(../images/scroll_footer_760x83.gif) no-repeat;
	background-position: top center;
	position: relative;
}
#footext {
	text-align: center;
	padding: 27px 40px 0 40px;
	color: #D7CAA9;	
}

/* SIDECOL */
#sidecol {
	width: 200px;
	padding: 0;
	margin: 150px 0 0 0;
	float:left;
	clear:left;
}
/* left margin for sidecolumn elements */
#sidecol h2,
#sidecol h3, 
#sidecol ul, 
#sidecol p {
	margin-left: 60px;
}
#sidecol a.caption {
	margin-left: 30px;
	display: block;
	padding: 4px 0 8px 0;
	width: 160px;
	text-align: center;
	
}

/* Wallpaper */
.screen, 
.wallpaper {
	padding: 0;
	margin: 4px;
	position: relative;
	top:0;	
	z-index: 11;
}
.screen .thumb {
	position: absolute;
	top: 6px;
	left: 6px;
	z-index: -1;
	margin: 0;
}
.wallpaper .thumb {
	position: absolute;
	top: 11px;
	left: 11px;
	z-index: -1;	
	margin: 0;	
}
.thumbgallery {
	clear: both;
/*	margin-bottom: 100px;
	border: 1px solid red;*/
}
.thumbgallery .screen,
.thumbgallery .wallpaper {
	float: left;
	margin: 18px 0;
	padding: 0;
	width: 150px;
}
.thumbgallery .screen p ,
.thumbgallery .wallpaper p {
	margin: 0;
	padding: 2px;
	text-align: center;
	font-size: 0.85em;
}
.thumbgallery .screen .thumb {
	top: 6px;
	left: 8px;
}
.thumbgallery .wallpaper .thumb {
	top: 12px;
	left: 12px;
}

/* Screenshots */

/* Sidebar Paper Column 
e.g. used for forum topics  
*/
#sidecol .papercol {
	background: url(../images/sidebar_paper_tile_190x184.gif) repeat-y top left;
	width: 190px;
	position: relative;  /* position for children */
	top: 0;
	margin: 125px 0 80px 0;
	padding: 0;
/*	border: 1px dotted green;	*/
}
#sidecol .papercol p {
	margin: 4px 20px 4px 20px;
}
.papercol ol {
	margin: 5px 10px 5px 25px;
	padding: 15px 5px 2px 15px;
}
.papercol ol li {
	margin-bottom: 0.5em;
}
.papercol img.paper-top {
	position: absolute;
	top: -72px;
	left: 0;
	margin: 0;
	padding:0;
}	
.papercol img.paper-endcap {
	height: 60px;
	position: absolute;
	bottom: -60px;
	left: 0;
}
#sidecol .papercol-bottom {
	width: 190px;
	position: relative;
	top: 0;
	left: 0;
	background: url('../images/paper_bottom_bg_190x168.gif') repeat-y top left;
	padding: 0;
	margin: 0 0 80px 0;
/*	border: 1px dotted red;*/
}
.papercol-bottom img.paper-endcap {
	height: 60px;
	position: absolute;
	bottom: -60px;
	left: 0;
}
.papercol-bottom .border-box {
	width: 155px;
	margin-left: 18px; 
}
#midcol {
	width: 450px;
	margin: 0;
	padding: 0;
	float: left;
}
#navcol {
	width: auto;
	position: absolute;
	right: -320px;
	top: 8px;
	/*margin: 0;*/
	padding: 0;
}
/* "backtotop" bookmark links  */
#navcol #btt-features {
	position: absolute;
	top: 303px;
}
#navcol #btt-awards {
	position: absolute;
	top: 870px;
}
#navcol #btt-gallery {
	position: absolute;
	top: 1500px;
}
/* navigation images */
#navcol img {
	margin-top: 4px;
}
#content {
	width: 450px;
	padding: 130px 0 30px 0;
	position: relative;
	margin: 0;
}
#content p.copy {
	margin: 1.5em 1.5em 2em 1.5em;
}
Parte del Template:
Codice:
<div id="maincol">

	
<center><img src="<?php get_theme_url(); ?>/themes/dragonage/default/images/bannerblacksmith.jpg"></center>
<div id="buttons"><a href="http://harad.altervista.org"><img src="<?php get_theme_url(); ?>/themes/dragonage/default/images/rnav_home_110x56.gif"></a></div>

<!-- SIDE COLUMN (sidebar) -->

<div id="sidecol">

<div class="papercol">
<img src="<?php get_theme_url(); ?>/themes/dragonage/default/images/sidebar_paper_top_latestforumtopics_190x72.gif" width="190" height="72" alt="" class="paper-top" />	
<?php get_navigation(return_page_slug()); ?>

						
<img src="<?php get_theme_url(); ?>/themes/dragonage/default/images/paper_bottom_largeendcap_190x60.gif" width="190" height="60" alt="" class="paper-endcap" />
</div>		


</div> <!-- chiusura div sidecol -->

<!-- MIDDLE COLUMN -->
<div id="midcol">

<div id="navcol">
<div id="count">

<!-- Histats.com  START  -->   
<script  type="text/javascript" language="javascript"> 
var s_sid = 41895;var st_dominio = 4;
var cimg = 406;var cwi =165;var che =100;
</script>
<script  type="text/javascript" language="javascript" src="http://s10.histats.com/js9.js"></script> 
<noscript><a href="http://www.histats.com/it/" target="_blank"> 
<img  src="http://s4.histats.com/stats/0.gif?41895&1" alt="javascript hit counter" border="0"></a> 
</noscript>  
<!-- Histats.com  END  -->

<div id="firefox">
<!-- Firefox -->
<a href='http://www.mozilla.com?from=sfx&amp;uid=0&amp;t=561'><img src='http://sfx-images.mozilla.org/firefox/3.6/125x125.png' alt='Spread Firefox Affiliate Button' border='0' /></a></div>

<div id="facebook"></div>

</div>
</div> <!-- chiusura div navcol -->

<!-- testo della pagina -->
<div id="content">
<?php 
get_page_title();
get_page_content();
?>
</div>
</div>

</div>
in breve
Codice:
maincol
 |- sidecol
 |- midcol
 |     |- navcol
 |               |-count
 |                      |-firefox
 |                      |-facebook
 |-content