You might want to submit your report along with a recommended patch, if you want to get it implemented quicker.

I second that, whole-heartedly. In fact, here's my suggestion for a better version (hoping I understand the intent correctly):

sub raw_fetch {
   my $class = shift;
   my $raw_cookie = get_raw_cookie(@_) or return;
   my %results;

   $raw_cookie =~ s/^\s+//;
   $raw_cookie =~ s/\s+$//;
   my(@pairs) = split(/\s*;\s*/,$raw_cookie);
   foreach (@pairs) {
     my ($key,$val) = (/^([^=]+)=?(.*)/);
     $results{$key} = $val;
   }
   return \%results unless wantarray;
   return %results;
}
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I've only tested it to the extent that the assignments to %results match the original code (except for the trailing whitespace glitch) -- that is, a "raw_cookie" string like this:

one=1 ;two=2; three=the third ; four=  ; five  ; six = the sixth ;

produces these key/value pairs:

'one'=>'1',
'two'=>'2',
'three'=>'the third',
'four'=>'',
'five'=>'',
'six '=>' the sixth'

(note that spaces next to "=" are not deleted)