I’m a little late to the game, but finally got around to installing PowerCLI 5.0.1. Upon connecting to my lab vCenter, I learned of the behavior change that will appear in future releases of PowerCLI. In short, you won’t be able to connect.
By default, it’s unset:
You simply type this:
set-PowerCLIConfiguration -invalidCertificateAction "ignore" -confirm:$false
It could potentially break all your scripts if you upgrade to whatever’s after 5.0.1.