As of the current rules, you cannot use Vital Strike as part of a charge. Vital Strike is an attack action, which is a type of standard action. Charge is a special full-round action (excluding partial charge). You cannot currently combine the two. The preview was in error. Alas I did not catch it until weeks later, and by then, there was no point in digging up old topics.
Hope that helps...
Jason Bulmahn
Lead Designer
Paizo Publishing