I am gonna be doing a large installation on EC2. It will have multiple servers for LDAP, MTA and Zimbra as described in the wiki. Will I have any issues if I run LDAP and MTA on small EC2 instances (32 bit) and run the Zimbra server on large EC2 instances (64 bit). I am concerned mixing 32 bit and 64 bit instances that it may create some issues. Will this setup work?