Blueprint sets
table {margin-bottom:1.4em;width: 100%;}
This line breaks the design. To reset this tag, you should add
.gwt-SuggestBoxPopup table,.gwt-SuggestBoxPopup td,
.gwt-DecoratedPopupPanel table, gwt-DecoratedPopupPanel td
{
margin: 0px;
padding: 0px;
width/**/:/**/ 14em;
}
Resource:http://www.webcredible.co.uk/user-friendly-resources/css/more-css-tricks.shtml