Perl 5.8.8 doesn't have this problem. Whatever it is, it appears to have been fixed. 5.6.1 is kind of "old".
Jeff japhy Pinyan,
P.L., P.M., P.O.D, X.S.:
Perl,
regex,
and perlhacker How can we ever be the sold short or the cheated, we who for every service have long ago been overpaid? ~~ Meister Eckhart