FMS Core failure

Hi,

I'm suddenly getting loads of "Faulting module FMSCore.exe" errors/warnings filling up my App event log. I hope its not because, but I'm not ruling it out, of the Security update KB958644 which was applied the day before.

Connect and Server Info.
The Connect version is 6 with SP3, its a basic install (not an Edge) with the DB/content on the local disk, the server is a fairly decent Dell PowerEdge 1950 (running Win2k3 Enterprise SP2), I haven't yet patched it for the Flash Player 10 debacle but aim to do it soon.

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The Application error details are:
Category: (100)
Event ID: 1000
Faulting application FMSCore.exe, version 2.0.2.61, faulting module FMSCore.exe, version 2.0.2.61, fault address 0x001ca726.
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Then I get a whole host of these Warning messages in the App Event log:
Source: FMS (Edge)
Category: (264)
Event ID: 1213
Connection rejected by server. Reason : [ Server.Reject ] : Virtual host _defaultVHost_ is not available.
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Has anyone seen anything similar happen?
I don't know much about Flash Media Server so any insight would be appreciated.

Thanks,
Si