I am sorry for not identifying the difference more clearly. In the raw input to join there is ... SB11966 +351958= 6211071 ..... The result is ... SB11966 +35195= 86211071 The 8 has shifted from before "=" to after "-". In both cases, "-" is followed by newline. I do not know if it is a bug in Mail::Audit - that is why I am asking the question. The full code segment is: 
use Mail::Audit;

my $item = Mail::Audit->new();
my $body = $item->body;

$tbody  = join('',@$body);

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In reply to Re^2: Strange join behavior by canoock
in thread Strange join behavior by canoock

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