IDNA converts whole URL to ascii not just hostname

Given a URL like
http://www.danske.dk/pølse
it is converted to
http://www.danske.xn--dk/plse-t1a
Also given pure ASCII seeds like
http://www.netarkivet.dk/website/links/index-da.htm it chokes on some of the
characters:
WARNING: Cannot convert seed http://www.netarkivet.dk/website/links/index-da.htm
to ASCII
gnu.inet.encoding.IDNAException: Contains non-LDH characters.
(which is strange since the web version http://josefsson.org/idn.php is fine
with that one=.
NOTE: This bug is originally from Bugzilla bug_id=398.