"scheme missing" sounds like some interpretation error and that is not what Wget should do. Maybe it has to do with a "convert links" default setting? Anyway, with a ~/.wgetrc that includes:
Code:
dir_prefix = /var/podcast/feeds
dirstruct = off
robots = off
logfile = /var/podcast/feeds.log
input = /var/podcast/feeds.list
convert_links = off
and running 'wget -N' I get no XML error messages whatsoever running wget-1.11(.4-2.el5_4.1). You could clean out your ~/.wgetrc and strace yours to try and understand but as you only want to D/L it cleanly you could also use any other D/L tool like curl if available.