> What option do I need to use to get HTTrack to
> download the images linked by the CSS ?It has worked for me. E.G.:
background: url("../../static/sys/v9/bg/bg_wrapper.jpg") repeat-y 0 0
transparent;
Original <http://www.spiegel.de/layout/css/style-V2-6-11.css>
	background: url("/static/sys/v9/bg/bg_wrapper.jpg") repeat-y 0 0
transparent;
Note the quotes.

1) does robots.txt allow that directory
2) override robots.txt -s0
3) try extended parsing -%P
4) try quoting the url.