Thank you all for your amazingly fast responses. :)
As it turned out, the following modified code worked correctly (the overhead is going out the window in a second):

#print ref($hashref), "|";
push @out, $hashref;
print keys %{$hashref};
#print ref($out[-1]), "ass|$out[$#out]|";
[download]

Which makes sense, I suppose, though it worked for Zaxo and Broquaint, as well as my other test script. Odd..