A lesson in change control by VMWare

This is how not to do it (thanks to virtualization.info for this):

This morning VMware’s customers that upgraded their virtual data centers with the new Infrastructure 3.5 Update 2 had an awful surprise: any virtual machine that is turned off cannot be powered on again, and any attempt to execute a VMotion (the live migration of a VM from one host to another) fails.

The reason behind this huge and unprecedented issue is an error in the license expiration time.
Full article here

Oops.