[CentOS] Help needed to pinpoint problem uebimiau+apache+centos 4.4

Hi,
I need some guidance to pinpoint a potential problem and I'm not sure
where is the problem.
I have a setup with:
centos 4.4 dvd on i386
mailscanner
uebimiau (webmail) 2.7.10
httpd-2.0.52-22.ent.centos4
httpd-suexec-2.0.52-22.ent.centos4
dovecot-0.99.11-2.EL4.1

The thing is that 3 of my 45 users complained that from the webmail
the address book and the sent items are missing. Cheking those
accounts in the webmail, I see that the address book and the sent
mails dissapeared.

this installation is 6 months old and we never had a glitch and I
haven't upgraded anything.

Im looking for hints to:
--find a uebimiau support group
--where to check in /var/spool/mail or /home/username the sent mails,
maybe they are there but are not shown in the web interface.
--some hints as to why this happened.

thanks in advance,

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Erick Perez
Panama, Republica de Panama
Cel Panama. +(507) 6694-4780
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