The first time a document is opened it's fine, opens in just a few seconds.
Subsequently, there is a long delay (about 20 seconds) in the "Contacting server for information..." step.
This happens to all users and all documents, each one will open fast the first time then slowly the second and subsequent times (until, we think, the app pool is recycled - there is no schedules iisreset/reboot).
This does not happen when using Office 2007.
IE6 and 7 exhibit the same behaviour.
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