Windows XP virtual machine .vmdk was converted to ESX format.
Machine is perfectly running on ESXi 5.1.
Next step - updating VMware tools driver in ESXi for xp guest - done.
Then restart requested.
During restart i get ESXi server crashed. First in my life

Situation is repeatable. I think the source is in the vmware tools driver and ESXі bug in kernel.
I think it is a BIG problem of VMware first, not starwind.
However I believe they better listen to you

Igor Palamarchuk
Senior Trainer/Consultant, Enterprise Platforms
i-Klass Training Center