A don't want to throw gazoline on fire, but I just hit the issue on RHEL 4.6...
Code:
The system will be modified - continue? [No] yes
Operations logged to /tmp/zmsetup.01082008-115642.log
Setting local config values...done.
Setting up CA...done.
Creating SSL certificate...done.
Initializing ldap... is only avaliable with the XS version at /opt/zimbra/zimbramon/lib/IO/Socket/SSL.pm line 30
BEGIN failed--compilation aborted at /opt/zimbra/zimbramon/lib/IO/Socket/SSL.pm line 30.
Compilation failed in require at /opt/zimbra/zimbramon/lib/Net/LDAP.pm line 970.
FAILED (2)
ERROR
Configuration failed
Please address the error and re-run /opt/zimbra/libexec/zmsetup.pl to
complete the configuration.
Errors have been logged to /tmp/zmsetup.01082008-115642.log
[root@zimbra01 zcs-NETWORK-5.0.0_GA_1870.RHEL4.20071218174057# uname -a
Linux zimbra01.sudouest.com 2.6.9-67.0.1.ELsmp #1 SMP Fri Nov 30 11:51:05 EST 2007 i686 i686 i386 GNU/Linux