last 3 lines of /tmp/install.log are:

Preparing packages...
file /opt/zimbra/lib from install of zimbra-ldap-8.0.5_GA_5839.RHEL6_64-20130910124005.x86_64 conflicts with file from package zimbra-core-8.0.5_GA_5839.RHEL6_64-20130910124005.x86_64

This is on Amazon Linux (CENTOS 6.3). Zimbra 8.0.4 has been running well for 4 months.

Looking through the forums, my best guess is that ldap did not shut down or there is memory problem. If it is memory, its probably due to tmpfs:

[ec2-user@mail ~]$ df -k
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/xvda1 103212320 3779592 99348872 4% /
tmpfs 3816804 0 3816804 0% /dev/shm
/dev/xvdf 51606140 1942448 47042252 4% /var

Looking for some guidance: ldap/tempfs/other?

Thanks in advance.

PS I realize now that I should've used 'size=512m' in /etc/fstab to limit the size of tmpfs