I'm thinking Zimbra checks the browser type that is reported and if it is recognized it goes to Advanced, all other are forwarded to Standard. Adjust my thinking if I'm wrong, but would this be a minor edit we might be able to adjust in some config file?
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Culley
Mail | Dell 2950III | 2x Quad Core 5420 | 8gb RAM | 6x 146gb RAID 0+1 | Red Hat 5.3 | Zimbra 6.0.1 Network Edition
Test | HP DL360 G3 | 2x Xeon 3.06ghz | 4gb RAM | 6x 18gb RAID 5 | CentOS 5.3 | Not in use now |