If you are seeing event log errors that looks something like this on your MPS engine server:
"Resolution of execute statements failed from a procedure=DeleteOrganization_ namespace=Managed Helpers executing procedure=TryDeleteAddressLists_ namespace=Managed Helpers. Check Event Viewer for additional namespace load errors."
It appears this is the result of some obsolete procedures calling non-existant ones. Check out this forum thread for info on how to rid your event log of these errors : http://forums.asp.net/t/1137212.aspx
Happy hosting!
Ben
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