Thanks for bringing my attention to the fact that we even have an RDF feed. I can't say that I can fix the error, I don't even know for sure that is in an error. To be honest, I don't even know what an RDF feed is. :0

I do know the power of Perl however!. Try this on for size:

use strict;
use LWP::Simple;

my $content = get('http://perlmonks.org/headlines.rdf') or die;
$content =~ s/<\/?RDF>//g;
print $content;
[download]

It might be a possible work-around for you in the meantime.

UPDATE:
RDF definition

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
F--F--F--F--F--F--F--F--
(the triplet paradiddle)