Some issues regarding the Actions button I have found when there are no responses to the event:
the option to change RSVPs is available to select but does nothing
the option to Email All Responders on the Action button is available and if you select this, you are just returned to the calender view with no status message
the Export Responses button creates a CSV file but this just contains a header row so is not really mush use
the Create Name Tags process can be completed but generates an empty fileĀ (I have raised additional issues with this option on a separate topic)
Bearing in mind recent messages about showing/hiding credit card details, it would be helpful if options were greyed out when the number of responders is zero.