Tinkering with CSS broken something? These are the default values used, in case you need to resort to a 'clean' install.

Background: height: 15px; width: 100px; margin: 0; padding: 0;
Progress Bar: height: 13px; margin: 1px; padding: 0px;
Border Style: 1px solid
Progress Text: margin: 5px 0px 15px 0px; padding: 0; color: #333333; font-size: 0.9em;
Title Text: margin: 15px 0px 5px 0px; padding: 0; border: none; font-size: 1em;

A (brief) primer on the CSS used:

* Be careful, when specifying the border style, not to include a closing semi-colon. If you close the declaration here, the color specified will probably be disregarded by the browser, causing the progress meter to display incorrectly.

* If you want to change the progress bar so no border is displayed, simply change the style to 0px instead of the default of 1px.

* If you don't wish to have a sliver of background visible between the border and the progress bar, change the height of the progress bar so that it equals the height of the background (ie, change the 13px to 15px). Don't forget to also change the margin of the progress bar (which is set to 1px by default) to 0px.

* If the rest of the CSS used isn't self-explanatory, I'd suggest reading up on CSS coding standards at http://www.w3schools.com/