Overriding a style on social networking site

In their main stylesheet, they have the following:

.text_huge {
font-family: Arial;
font-size: 18px;
}

I'd like to reduce the size. Is there a way in the user css code?

If you can write your own HTML/CSS you can just override this by setting the same declaration and inserting a new value.

On MySpace they use a method that doesn’t validate according to the W3C specifications but it seems to work anyway. There you just put a style element into the body with the appropriate CSS in it.