ok, it's because we have used overflow:hidden in the column layout CSS.
Rather than mess with the layout, try this instead... (you can adjust the box positioning with the right and top properties)
Code:
/**
* Dialog message container
*/
#dialog-message {
margin: 0;
padding: 0;
position: absolute;
right: 100px;
top: 0px;
width: 350px;
z-index: 10000;
}