One more thing, if I just throw a validation error, that works fine, but it doesn't put the error message on both of the fields.
raise forms.ValidationError(u"You need to pick a start date and time in the future.") -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.