first, a little background. This server has been up and running for almost 9 months now without any issues. It hosts 4 mail domains, all of which worked fine until 2 days ago, when both the web interface and Zimbra client connections went down.

Ubuntu 8.04 LTS x64 hosted on VMWare VSphere 4.0

Release 6.0.2_GA_1912.UBUNTU8_64 UBUNTU8_64 NETWORK edition.

I'm receiving the below errors when trying to start Zimbra. From my research on these forums, it appears to be an SSL cert issue (I'm just using self signed certs on this box)

zimbra@mail:/root$ zmcontrol start
Unable to determine enabled services from ldap.
Enabled services read from cache. Service list may be inaccurate.
Starting logger...Failed.
Starting logswatch...ERROR: service.FAILURE (system failure: ZimbraLdapContext) (cause: PKIX path validation failed: timestamp check failed)
zimbra logger service is not enabled! failed.

Starting convertd...Done.
Starting mailbox...Done.
Starting antispam...Done.
Starting antivirus...Done.
Starting snmp...Done.
Starting spell...Done.
Starting mta...Done.
Starting stats...Done.

other posts have suggested trying to recreate the self-signed certs, but that also gives me errors. (found here)

When I run 'zmcertmgr createcrt -new -days 365' I get the following output

root@mail:~# /opt/zimbra/bin/zmcertmgr createcrt -new -days 365
Validation days: 365
** Creating /opt/zimbra/conf/zmssl.cnf...done
** Backup /opt/zimbra/ssl/zimbra to /opt/zimbra/ssl/zimbra.20101110102726
** Generating a server csr for download self -new -keysize 1024
** Creating /opt/zimbra/conf/zmssl.cnf...done
** Backup /opt/zimbra/ssl/zimbra to /opt/zimbra/ssl/zimbra.20101110102726
** Creating server cert request /opt/zimbra/ssl/zimbra/server/server.csr...done.
** Saving server config key zimbraSSLPrivateKey...failed.
** Signing cert request /opt/zimbra/ssl/zimbra/server/server.csr...done.

slapd is also running (and the only ldap process running)
zimbra 22116 29672 0 10:22 pts/2 00:00:00 grep slapd

here is my /etc/hosts file. the last entry is for my BackupPC box (not related)
Code: localhost.localdomain localhost mail mail mail mail backup

obviously I'm missing something here...did my cert expire out of the blue and hose my install, or what? I honestly haven't had to touch this install much at all until now, and I didn't do anything prior to it going down. I appreciate any direction.