[THIN] Limit 1 instance per user

XenApp 5 for 2003 - we have numerous apps in a new farm where the "Allow
only one instance of application for each user" restriction has been set.
We are finding that users are being denied login to the server with an error
that they already have the application open, when it can be verified in the
 AMC they have zero instances of that published app running.
Anyone seen this before?

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