Div Height changes - how to control in various browsers?

Going nuts... website is www.thechinuexproject.org.... looking in particular at a non-linked page (until I get it right)..... resources_rev.html.

Client has demanded many changes on left side navbars.... which has changed the dynamics when anything is added to the right side (gold) area. I'm seeing it fine in Firefox, etc., but my client is using an older version of Explorer.... and she's seeing a "gap" at the bottom of the gold area.

I've been re-adjusting the gold area with a line-break with height.... and that works for everything else. [CODE]<br style="line-height:39px;">

Help!

My css:
[CODE]
body{
padding:0px;
margin:0px;
background:#F6C402;
text-align:center;
}

a:hover{text-decoration:none;}

img { border:0px;}

.dt { display:table; width:100%; overflow:auto;}

.dr { display:table-row; width:100%; height:100%; overflow:auto;}

.dc { display:table-cell; text-align:justify; vertical-align:top; width:100%; height:100%; overflow:auto;}

.df { display:table-cell; text-align:justify; vertical-align:top; width:100%; background:#87500C;}

*html .dc {
float:left;
height:100%;
vertical-align: auto;
}

.main_text, input, textarea, body, font, select
{
font-family:Tahoma;
font-size:11px;
line-height:15px;
color:#040202;

}

ul { margin:0px; padding:0px; list-style: none;}
li {background:url(images/a2.gif) no-repeat left center; margin: 0px 0px 0px 0px; padding:0px 0px 0px 9px; font-weight:bold}
li a {font-family:Tahoma; font-size:11px; line-height:18px; color:#040202}

span strong { color:#040202}

strong a { color:#040202}


.h_text{ color:#E8E7E7 font-weight:normal;}
.h_text a{ color:#E8E7E7; font-weight:normal; text-decoration:underline}

.f_text{ color:#040202; text-decoration:none}
.f_text:hover{ color:#AFAFAF; text-decoration:underline}

.w_text { color:#040202}

.l_text { color:#040202; font-weight:bold; text-decoration:none}
.l_text:hover{ color:#9E9E9E; font-weight:bold; text-decoration:underline}

.c_text { color:#040202;}
.c_text a{ color:#040202; font-weight:bold; text-decoration:none}
.c_text a:hover{ color:#858585; text-decoration:underline}

.c2_text { color:#040202;}
.c2_text a{ color:#040202;}

.r_text { color:#AE0200;}
.r_text a{ color:#AE0200;}

.main_border { border-left:1px #888888 solid; border-right:1px #888888 solid; margin:auto; width:766px; height:100%;}

.main { width:766px; height:828px;}

.header { height:386px; background:url(images/bg-topbrown_stars.jpg) no-repeat;}
.header_r1 { height:106px;}
.header_r2 { height:280px;}

.content { height:333px;}

.cell_bg1 { background:url(images/leftgreen.jpg) repeat;}

.cell_bg2 { background:#87500C;}

.cell_bg3 { background:#D8AC03;}

.footer { height:105px;}
.footer .dc { text-align:center;}
.footer_r1 { background:#87500C; height:5px;}
.footer_r2 { background:#87500C; height:39px;}
.footer_r3 { height:61px;}

.footer .df { text-align:center;}
.footer_r1 { background:#000000; height:10px; }
.footer_r2 { background:#87500C; height:39px;}
.footer_r3 { height:61px;}

form { margin:0px; padding:0px;}

.form{height:23px; margin-top:3px;}
.form input {width:178px; height:20px; padding-left:3px}

textarea{width:178px; height:153px; padding-left:3px; overflow:hidden; margin-top:3px}
.input {width:128px; height:17px; background-color:#D6D6D6; padding-left:5px; color:#31312F; font-size:10px; line-height:10px; padding-top:0px;}

.h_l { background:#41413F; height:1px;}

.v_l { background:url(images/bg-line.gif) repeat-y left;}

Hello a1000w,
Odd lengths and gaps can many times be caused by missing closing tags. The validator (http://validator.w3.org/check?verbose=1&uri=http%3A%2F%2Fwww.thechinuexproject.org%2F) shows this page (http://www.thechinuexproject.org/) missing a few.

It's a place to start anyway.

When posting code in the forum, please use the code tags, [code][/code] - available with the # button in the post edit window.
This will wrap your code in a scroll box which greatly helps the readability of your post.