It appears that it is the width that is assigned in the .pg-gl style in the common.css file. The file is the one located here:
common.css
In this file near line 11 is this style:
/* wrapper
--------------------------------------------------*/
.pg-gl {
width: 720px;
font-family: Arial, Helvetica, sans-serif;
background-color: #1e1e1e;
padding: 8px 0 8px 8px;
}
If you adjust the width in here to 725px it looks like it will allow the images to fit.