-bash-3.00$ uname -a
SunOS deimos 5.10 Generic_138889-03 i86pc i386 i86pc
-bash-3.00$ perl -Mthreads -e 'print $threads::VERSION . "\n"'; perl -Mthreads::shared -e 'print $threads::shared::VERSION . "\n"' ; perl -v
1.72
1.28

This is perl, v5.8.8 built for i86pc-solaris-thread-multi