You either have to change the size of the text or the margin on the bottom - look at this code.
CODE
<!-- begin code provided by createblog.com -->
<style type="text/css">
div.blogheader, .caption, .blogheader2 {
/* edits the dates */
font: bold 11px tahoma;
font-variant: small-caps;
color:#D6E4F8;
background-color: #7B94BD;
text-align: center;
margin-bottom: 2px;
padding:0px;
}
</style>
<!-- end code provided by createblog.com -->