I think I found a bug in DateTime's strftime. If you have a nanosecond value that rounds up to a full second, it returns instead a tenth of a second. Pls see the example code and output for details. Am I seeing this correctly? If so I will submit a bug to the maintainers. Sample Code: 
use strict;
use warnings;

use DateTime;
use DateTime::Format::Strptime;

my $val = "2011-11-11 14:30:00.999981";

my $format = new DateTime::Format::Strptime(
                pattern => '%F %T.%N',
                time_zone => 'GMT',
                );

my $date = $format->parse_datetime($val);
print $date->strftime("%F %T.%3N %Z")."\n";

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Output: 
2011-11-11 14:30:00.1000 UTC

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I would expect: 
2011-11-11 14:30:01.000 UTC

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In reply to Rounding Issue in DateTime strftime? by SparkeyG

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