I just upgraded from esxi 5.0 to 5.1 to get rid of constantly crashing VMtools on my 2008r2 terminal server. Well, errors are back, just in different form.
At first I got this:
[ warning] [vmusr:vmtoolsd] Failed registration of app type 2 (Signals) from plugin unity.
By following instructions in http://communities.vmware.com/message/2110430 I got rid of it. But then another error came up, it is raised after any user logs in to terminal:
-<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
-<System>
<Provider Name="VMware Tools" />
<EventID Qualifiers="0">1000</EventID>
<Level>3</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2013-01-15T07:03:36.000000000Z" />
<EventRecordID>35299</EventRecordID>
<Channel>Application</Channel>
<Computer>pantera.----------</Computer>
<Security UserID="S-1-5-21-1238592200-306474511-1734353810-1820" />
</System>
-<EventData>
<Data>[ warning] [vmusr:vmusr] Channel restart failed [1]</Data>
</EventData>
</Event>
From terminal user point of view, nothing happens, everything works fine. But I hate having a server which fails to restart something 100 times per day.