THX for this.. came to late for me.....
luckiliy my system restore point saved my day
Way hay, Vista is immune.
Hmm, just installed VMware vSphere Client and Host Update Utility
11/19/09 | 4.0 Update 1 | 112 MB | Binary (.exe)
and it worked
If you have vmware update 1 already installed then you don't need to worry about this. Those of you that don't, why not?! :P