The results were the similar through my tests, so I did a little digging, and found that the problem seemed to come when there was no expires time. The expires time gets returned in the form 
HTTP::Date::str2time($response->header('Expires'))

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Taking a quick look in Date.pm, near the top of the str2time function is the line 
return unless defined $str;

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Changing this line to instead read 
return undef unless defined $str;

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seems to produce the desired result, but I don't know enough offhand about this module to know whether that would affect any other desired behavior.

In reply to Re: LWP::Simple by Anonymous Monk
in thread LWP::Simple, a bug in head() function? by capa

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