text-transform topmenu

Hi .
In Flashes where could I change the topmenu text-transform from uppercase to none ?

in template_css.php:

#topmenu_pad {
font-style: normal;
font-weight: normal;
text-transform:uppercase;
letter-spacing: normal;
line-height: 1.45em;
position:relative;
margin:2px auto;
height:542px;
width:960px;
background-position:0 0;
background-repeat:no-repeat;
background-color:transparent;
}

Hi Ivan.
I did exactly the same (as firebug display the code), but I put it in template_css.css.
Thanks