Ordered List (ol) showing up un-numbered?

While the list-style-type is most likely the problem, especially if you've used a reset stylesheet, you might also make sure that the margin-left/padding-left of the list is large enough that the numbers can fit into the space.

Also, it might be worth adding list-style-position: inside; just to see if the numbers are being generated/applied by the browser.

It's going to be a CSS issue. CSS can change the numbering/bullet style, and even turn it off altogether. Using Firebug, inspect the element and look at the CSS styles on the right to see what styles are being applied to it. Look for one called list-style.