Double borders in Firefox?

Hi, I’m having a problem putting a border around my page container in Firefox. It looks fine in IE6/7, but in Firefox, the border is crushed up at the top of the page above the header, as you can see here – https://www.strawberrymedicalat.net/

How can I fix this, and why is it happening? This is the code for the page container – do I need to add something to it…?

#wrapper{
margin: 45px auto 45px auto;
width: 750px;
text-align: left;
border: 3px double #F1A5C7;
}

Thanks in advance! ??