This is caused by the overflow hidden property on the #outerWrapper #contentWrapper #rightColumn1 #topBlue selector.
change:
#outerWrapper #contentWrapper #rightColumn1 #topBlue {
background-image:url(../images/rightBlue_01.png); height:auto;
background-repeat:no-repeat;
overflow:hidden;
height:950px;
}
to:
#outerWrapper #contentWrapper #rightColumn1 #topBlue {
background-image:url(../images/rightBlue_01.png); height:auto;
background-repeat:no-repeat;
/*overflow:hidden;*/
height:950px;
}