Mediatemple.net uses parallels plesk for their front end. There is some kind of odd bug with plesk 11 where the IP will have an additional four numbers and when you don't add those numbers there has been some "weirdness" even if you designate a subdomain as the primary domain. So the solution is to add the additional numbers when developing. Supposedly once you assign a real domain name to the IP these issues are irrelevant.
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