Note - I agree with Nancy
As for your experiment, to prevent the "drop" reduce the spry CSS padding in line 76 selector from 21px to 18px.
.TabbedPanelsTab {
-moz-user-select: none;
background-color: #000000;
border-color: #000000;
border-left: 0 solid #000000;
border-style: solid;
border-width: 2px 0 0;
cursor: pointer;
float: left;
font-family: "Myriad Pro";
font-size: 1em;
font-weight: normal;
height: 15px;
list-style: none outside none;
margin: 0;
padding: 4px 18px;
position: relative;
top: 0;
}
Don't use dummy text without normal length text with breaks