AmphetaDesk assumes that the RSS namespace is the
default namespace of the XML document (so item, not rss:
item, or feed:item). As such, any feed that does not have
RSS as a default namespace fails miserably.
Partially, this is because we're using a simple tree-based
parser (XML::Simple). I've got ways of fixing this in my
head, but they're elegant hacks, really.