Kolab 3.0 - Roundcube + Bynari + Sincroton: contacts access anomalies

[R.C.]

Hi to the list.

System:
Server: Centos 6.4 + kolab 3.0 all updated with yum update
Clients:
Outlook 2003+Bynari4.2
Android Jelly Bean with default Activesync functionalities
Kolab default roundcubemail

It seems that when adding/modifying contacts with Roundcube/Android, 
everything works fine. But after creating/modifying at least one contact 
with Outlook, weird things happen:
- sometimes contacts disappear in Android and then reappear, very difficult 
to tell when
- moving contact to child folder and then back to parent (the one shared 
with sincroton) seems to make contacts reappear in Android, but not always
- sometimes Android lists just a subset of contacts

Still investigating to find precise actions that determines vaious 
behaviours but it's very time consuming...

Thnx

Raf