Like Anonyrnous Monk (clever name, by the way), I cannot duplicate the problem. I tried with 5.10.1, 5.12.2, and 5.13.4 on Linux. Perhaps it's a problem with the Cygwin Perl? I suppose I could hook up a Windows box to see, but I'm sure none of my Cygwin installations are current. Do you have Strawberry Perl or ActiveState Perl installed with which to test?

This is perl, v5.10.1 (*) built for x86_64-linux-thread-multi
(with 1 registered patch, see perl -V for more detail)
[download]

This is perl 5, version 12, subversion 2 (v5.12.2) built for x86_64-li
+nux-ld
[download]

This is perl 5, version 13, subversion 4 (v5.13.4) built for x86_64-li
+nux-ld
[download]