If the page formatting looks off, try the following.
Windows/Linux
Refresh your browser by holding "Control" and pressing "F5", or holding "Control" and clicking the reload button on your browser.
Mac
Hold down the "Shift" key and click the reload button in your browser.
Hold down the "Shift" and "Command" buttons, and press "R".
I've added some version #'s to our stylesheets, per ia's suggestion below, so hopefully this isn't necessary.