New Product Box - Border too big, displayed incorrectly

Hi All

Whats wrong with the centre "New Products" box? the border on the right is too big. I don't know how this happened, I have not edited the stylesheet for a while, eveything was looking perfect, then I uploaded some zones and turned off some sideboxes which is when i noticed this glitch. I reset my sideboxes but this did not fix the error.
I found the code in my stylesheet:
.centerBoxWrapper {
background-color: #ff6e02;
background-image: url(../images/titlebg.gif);
background-repeat: repeat-x;
height: 1%;
border: 1px solid #ff6e02;
border-bottom: 5px solid #ff6e02;
}

However if I change the border size, the right hand side is always bigger than the rest.
Please help, I've spent hours on this site and dont want to start from scratch, many thanks.

Picture:

Store:
http://www.sukigeepromo.com