I was using 2 virtual machines, decided to restore a snapshot of one (while it was running), and the host BSODed with 0xe0000001 in vmx86.sys. This is actually the 3rd blue screen I had since installing tech preview, but I wasn't around when the first one happened, and the second one happened while shutting down the computer for the night (and possibly wasn't VMWare-related).
I can provide the dumps if necessary.
I'm running Workstation on Windows 8 Pro x64.