We are seeing the same thing.
FF3b5 on OpenSuSE 10.3 connecting to 64-bit ZCS 5.0.4NE on SLES10, w/ http mode set to "redirect".
If I hit the FF3 "stop" button immediately followed by the "reload" button, the https login screen loads instantly.
If I log out of ZCS but keep the browser open, subsequent connects to ZCS have the login window appear near instantly.
Hope that helps,
Mark
P.S. If anyone form Zimbra wants logs, Wireshark packet captures, etc., just let me know.
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___________________________________ L. Mark Stone, CIO  "Uptime. All the time."
477 Congress Street | Portland, ME 04101-3431 | (207) 772-5678
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