in reply to Any idea why LWP:Simple doesn't like this particular website?

Update: Tried lwp on that site and it works.
perl -e "use LWP::Simple; getprint ''"

It's possible for a site to block lwp transfers via $ENV{'HTTP_USER_AGENT'} on the server side. You could try using LWP::UserAgent to specify your own agent:

$ua = LWP::UserAgent->new; $ua->agent('Odyssey/2001');

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