In the style.css file for the Vastitude skin, there are a number of rules that apply to a tables with the class of 'invisible'. Does know what part of the skin these are applied to, as so far, I've been unable to track down a use case for them. This is the section of CSS code.

table.invisible {max-width:462px;}
table.invisible td.left {vertical-align:top; width:10px;}
table.invisible td.right {vertical-align:top; text-align: right; width:50px; padding-left:25px;}