User Profile Service - Event ID 1534

Hi Guys,
I have a 2008 Terminal Server which is logging an Event ID 1534 when a user logs in with the following description...

Profile notification of event Load for component {56EA1054-1959-467f-BE3B-A2A787C4B6EA} failed, error code is -2147024894. 

I've done a search for the GUID and found it belongs to "SHACCT Profile Notification Handler".
There is no problems with the profile and everything runs nicely - but I would rather find what is causing this warning, any ideas guys?

Many thanks - Nathan