Strange problem on annotations after migration x86 -> x86_64

[Alain Abbas]

Hello
I migrater a kolab 2.2.4 from a32bits to a 64 bits
debian 6
steps :
1) installation debian6 x86_64
2) download sources
3) Compilation
bootstrap -b with the same parameters than the production server

Tests
Ok

4)export / import ldap
by a slapcat on the old server and slapadd on the new

Copy  oldserver /kolab/var/imapd on the new server
conversion of annotations berkeley to skiplist (the x32 was on berkeley, 
but i tried with the 2 formats

Test mails all ok except the annotations
when i check the annotations there are the 4 first characters missing in 
each annotation fields
127.0.0.1> info user/alain.abbas/Contacts at dxx.fr
{user/alain.abbas/Contacts at dxx.fr}:
  condstore: false
  duplicatedeliver: false
  lastpop:
  lastupdate: 22-Jul-2011 03:57:31 +0200
  partition: default
  sharedseen: false
  size: 11475
  folder-type: act.default

see contact.default became act.default

if i check with od -c in the annotation the db i see the good value.

Anyone has and idea why ?