Test Version Of New Website Design

[bmull]

Better to pick one unit of measurement and stick with it - ems (em),
pixels (px), centimeters (cm), or inches (in). (Does CSS still support
inches, BTW?) That
way there's consistency in the way the browser lays out the page.

True, however, in this case the 20px is because the text will "slide" under the menu if we adjust all the settings to 0 and using an em will move the text up or down with a fontsize change allowing the text to move back under the menu.  By forcing a px offset the text size can still be changed to a smaller size without this problem.