valgrind different resultat sur different OS

hello les gurus du C

je travaille toujours sur mon petit projet en c
je me sers maintenant de openssl pour encoder mes donnees en
base64
mon dernier code est disponible içi

https://raw.github.com/fakessh/openprojectssl/master/smtp_openssl.c

mes tests avec valgrind sur different os à savoir centos 5 et
6
me retournent des resultats differents

centos 5
=2073==
=2073== HEAP SUMMARY:
=2073== in use at exit: 29,392 bytes in 2,002 blocks
=2073== total heap usage: 2,720 allocs, 718 frees,
185,730 bytes allocated
=2073==
=2073== LEAK SUMMARY:
=2073== definitely lost: 0 bytes in 0 blocks
=2073== indirectly lost: 0 bytes in 0 blocks
=2073== possibly lost: 36 bytes in 3 blocks
=2073== still reachable: 29,356 bytes in 1,999 blocks
=2073== suppressed: 0 bytes in 0 blocks
=2073== Rerun with --leak-check=full to see details of
leaked memory
=2073==
=2073== For counts of detected and suppressed errors, rerun
with: -v
=2073== ERROR SUMMARY: 0 errors from 0 contexts
(suppressed: 29 from 10)


centos 6
=654==
=654== HEAP SUMMARY:
=654== in use at exit: 39,320 bytes in 2,485 blocks
=654== total heap usage: 3,500 allocs, 1,015 frees,
825,327 bytes allocated
=654==
=654== LEAK SUMMARY:
=654== definitely lost: 0 bytes in 0 blocks
=654== indirectly lost: 0 bytes in 0 blocks
=654== possibly lost: 0 bytes in 0 blocks
=654== still reachable: 39,320 bytes in 2,485 blocks
=654== suppressed: 0 bytes in 0 blocks
=654== Rerun with --leak-check=full to see details of
leaked memory
=654==
=654== For counts of detected and suppressed errors, rerun
with: -v
=654== Use --track-origins=yes to see where uninitialised
values come from
=654== ERROR SUMMARY: 349 errors from 6 contexts
(suppressed: 29 from 10)


je ne sais pas bien analyser les resultats mais il y a de
grandes differences entre les deux plateformes

un nombre erreur qui varie du simple au double

et il semblerait qu il y a une fuite de memoire sur centos 5

pouvez vous m aider à comprendre la nature des resultats

sincerement