try to change this existing one:
#text-3 .widget
{
width:470px;
}
to the right syntax, i.e.:
#text-3.widget
{
width:390px;
}
or the other existing one:
aside#text-3 {
width: 850px;
}
for instance, to:
#footer aside#text-3 {
width: 390px;
}
either of those should work.
