firefox diplay issue

[minnow]

Hi, I am having firefox display issues with this site (http://www.resolvehrltd.co.uk). The content in the main pane of the site is being "pushed down" by the grey contact details and software banner in the left hand column. It shows fine in IE. Anyone have any ideas? Its probably something really obvious, and please accept my apologies if it is, but I can't see for looking.
Thanks for your help.
minnow

[Fang]

#contentwide {overflow:hidden;}

[Excavatorak]

or/***** Main content *****/

#contentwide {
/*align: right;*/
width: 565px;
margin:0 0 5px 170px;
border-left:1px solid #f0f0f0;
padding:0 10px 10px 10px;
line-height:1.5em;
}
#testimonial {
align: bottom;
/*clear:left;*/
margin:0 0 10px;
padding:10px 10px 10px 10px;
width:535px;
font-size:0.9em;
background-color:#fdf6d9;
color:#505050;
border-left:5px solid #ffffff;
line-height:1.5em;
}

#bullets {
/*clear:left;*/
margin:0 0 20px;
padding:0 5px 0 10px;
width:545px;
line-height:1.5em;
}

[minnow]

Thanks for your speedy replies. I went with Fang's option in the end and that has sorted it nicely. Cheers guys :-)