> But the case is in one site: <http://www.ist.utl.pt>.
> The <http://www.ist.utl.pt/css/iststyle.css> that is used 
> imports a main.css.. like this: @import url('main.css');
> This file is located at 
<http://www.ist.utl.pt/css/main.css> 
> and not in <http://www.ist.utl.pt/main.css> as httrack 
> translates it.

Oops - this is the case for javascript, apparantly not for 
css. Fixed for the next release!