I'm not sure if this is exactly what you meant by "under Windows", but for what it's worth, 1.16 passes its tests under Cygwin/Vista.

CYGWIN_NT-6.0 hostname 1.7.1(0.218/5/3) 2009-12-07 11:48 i686 Cygwin

gcc version 4.3.4 20090804 (release) 1 (GCC)

This is perl, v5.10.1 (*) built for i686-cygwin-thread-multi-64int (wi
+th 12 registered patches, see perl -V for more detail)
[download]