in reply to @- Bug on the loose, lets isolate it

It gives me 134687888 on Linux some.host.com 2.4.19-16mdk #1 Fri Sep 20 18:15:05 CEST 2002 i686 unknown unknown GNU/Linux with the following perl : 
This is perl, v5.8.0 built for i386-linux-thread-multi

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But I got 0 on Linux another.host.com 2.6.9-5.0.3.EL.rootsmp #1 SMP Mon Mar 21 15:42:59 CET 2005 i686 i686 i386 GNU/Linux running the following perl:
This is perl, v5.8.5 built for i386-linux-thread-multi

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The buggy one (Mandrake) is compiled with O3 optimization, the good one (RedHat) with O2 flag. That's the most signification difference I see at the moment.
Here are the gory details, first the buggy one:
Summary of my perl5 (revision 5.0 version 8 subversion 0) configuratio
+n:
  Platform:
    osname=linux, osvers=2.4.19-2mdkenterprise, archname=i386-linux-th
+read-multi
    uname='linux no.mandrakesoft.com 2.4.19-2mdkenterprise #1 smp tue 
+aug 13 00:17:42 cest 2002 i686 unknown unknown gnulinux '
    config_args='-des -Darchname=i386-linux -Dcc=gcc -Doptimize=-O3 -f
+omit-frame-pointer -pipe -mcpu=pentiumpro -march=i586 -ffast-math -fn
+o-strength-reduce -Dprefix=/usr -Dvendorprefix=/usr -Dsiteprefix=/usr
+ -Dman3ext=3pm -Dcf_by=MandrakeSoft -Dmyhostname=localhost -Dperladmi
+n=root@localhost -Dd_dosuid -Ud_csh -Duseshrplib -Dusethreads'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=define use5005threads=undef useithreads=define usemulti
+plicity=define
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasin
+g -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gdbm',
    optimize='-O3 -fomit-frame-pointer -pipe -mcpu=pentiumpro -march=i
+586 -ffast-math -fno-strength-reduce',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -I/usr/i
+nclude/gdbm'
    ccversion='', gccversion='3.2 (Mandrake Linux 9.0 3.2-1mdk)', gcco
+sandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=1
+2
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t',
+ lseeksize=8
    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='gcc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lnsl -lndbm -lgdbm -ldl -lm -lpthread -lc -lcrypt -lutil
    perllibs=-lnsl -ldl -lm -lpthread -lc -lcrypt -lutil
    libc=/lib/libc-2.2.5.so, so=so, useshrplib=true, libperl=libperl.s
+o
    gnulibc_version='2.2.5'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-rdynami
+c -Wl,-rpath,/usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE'
    cccdlflags='-fpic', lddlflags='-shared -L/usr/local/lib'


Characteristics of this binary (from libperl): 
  Compile-time options: MULTIPLICITY USE_ITHREADS USE_LARGE_FILES PERL
+_IMPLICIT_CONTEXT
  Built under linux
  Compiled at Sep  6 2002 23:24:44
  @INC:
    /usr/lib/perl5/5.8.0/i386-linux-thread-multi
    /usr/lib/perl5/5.8.0
    /usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.0
    /usr/lib/perl5/site_perl
    /usr/lib/perl5/vendor_perl/5.8.0/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.0
    /usr/lib/perl5/vendor_perl
    .

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And the good one: 
Summary of my perl5 (revision 5 version 8 subversion 5) configuration:
  Platform:
    osname=linux, osvers=2.4.21-25.elsmp, archname=i386-linux-thread-m
+ulti
    uname='linux porky.build.redhat.com 2.4.21-25.elsmp #1 smp fri nov
+ 12 21:34:51 est 2004 i686 i686 i386 gnulinux '
    config_args='-des -Doptimize=-O2 -g -pipe -m32 -march=i386 -mtune=
+pentium4 -Dversion=5.8.5 -Dmyhostname=localhost -Dperladmin=root@loca
+lhost -Dcc=gcc -Dcf_by=Red Hat, Inc. -Dinstallprefix=/usr -Dprefix=/u
+sr -Darchname=i386-linux -Dvendorprefix=/usr -Dsiteprefix=/usr -Duses
+hrplib -Dusethreads -Duseithreads -Duselargefiles -Dd_dosuid -Dd_semc
+tl_semun -Di_db -Ui_ndbm -Di_gdbm -Di_shadow -Di_syslog -Dman3ext=3pm
+ -Duseperlio -Dinstallusrbinperl -Ubincompat5005 -Uversiononly -Dpage
+r=/usr/bin/less -isr -Dinc_version_list=5.8.4 5.8.3 5.8.2 5.8.1 5.8.0
+'
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=define use5005threads=undef useithreads=define usemulti
+plicity=define
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='gcc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DDEBUGGING -fno-st
+rict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_
+OFFSET_BITS=64 -I/usr/include/gdbm',
    optimize='-O2 -g -pipe -m32 -march=i386 -mtune=pentium4',
    cppflags='-D_REENTRANT -D_GNU_SOURCE -DDEBUGGING -fno-strict-alias
+ing -pipe -I/usr/local/include -I/usr/include/gdbm'
    ccversion='', gccversion='3.4.3 20041125 (Red Hat 3.4.3-6.EL4)', g
+ccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=1
+2
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t',
+ lseeksize=8
    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='gcc', ldflags =' -L/usr/local/lib'
    libpth=/usr/local/lib /lib /usr/lib
    libs=-lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lpthread -lc
    perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
    libc=/lib/libc-2.3.3.so, so=so, useshrplib=true, libperl=libperl.s
+o
    gnulibc_version='2.3.3'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E -
+Wl,-rpath,/usr/lib/perl5/5.8.5/i386-linux-thread-multi/CORE'
    cccdlflags='-fPIC', lddlflags='-shared -L/usr/local/lib'


Characteristics of this binary (from libperl):
  Compile-time options: DEBUGGING MULTIPLICITY USE_ITHREADS USE_LARGE_
+FILES PERL_IMPLICIT_CONTEXT
  Built under linux
  Compiled at Dec  1 2004 14:28:51
  @INC:
    /usr/lib/perl5/5.8.5/i386-linux-thread-multi
    /usr/lib/perl5/5.8.5
    /usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.4/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.3/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.2/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.1/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.0/i386-linux-thread-multi
    /usr/lib/perl5/site_perl/5.8.5
    /usr/lib/perl5/site_perl/5.8.4
    /usr/lib/perl5/site_perl/5.8.3
    /usr/lib/perl5/site_perl/5.8.2
    /usr/lib/perl5/site_perl/5.8.1
    /usr/lib/perl5/site_perl/5.8.0
    /usr/lib/perl5/site_perl
    /usr/lib/perl5/vendor_perl/5.8.5/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.4/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.3/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.2/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.1/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.0/i386-linux-thread-multi
    /usr/lib/perl5/vendor_perl/5.8.5
    /usr/lib/perl5/vendor_perl/5.8.4
    /usr/lib/perl5/vendor_perl/5.8.3
    /usr/lib/perl5/vendor_perl/5.8.2
    /usr/lib/perl5/vendor_perl/5.8.1
    /usr/lib/perl5/vendor_perl/5.8.0
    /usr/lib/perl5/vendor_perl
    .

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In Section Seekers of Perl Wisdom