I'm using Getopt::Long, like this:

my($dir, $year, $start, $delay);

GetOptions (
    'dir=s'   => \$dir,
    'year=i'  => \$year,
    'start:i' => \$start,
    'delay:i' => \$delay
    );
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And when I call my script like this:

scriptname --dir foo --year 2007 --delay 30

everything is fine.

When I call it like this, with the options in a different order, it dies:

scriptname --dir foo --delay 30 --year 2007 
Option year requires an argument
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But if I add an equals sign, it's OK:

scriptname --dir foo --delay 30 --year=2007

I can't figure out what's going on by referring to the module's documentation on CPAN. TIA.