The Courier IMAP backwards compatibility section in the Namespaces wiki suggests that hidden aliased namespace can cause problems for some clients but doesn't quantify the extent or likelihood of running into these problems.

Does anyone with real world experience with similar configurations have any feedback?

-- kelsey.cummings@sonic.com sonic.net, inc. System Architect 2260 Apollo Way 707.522.1000 Santa Rosa, CA 95407