Dennis @ PerfectForms
Our forms are published in HTML (not HTML5). It is true that different browsers handle HTML in slightly different ways. We try to find a happy medium for them all. We will slowly be discontinuing our support of Flash. I will be happy to help with specific form design issues. Simply fill out a support inquiry form at /support_contact.php.
Export your form design and attach a copy of the .PF file to the inquiry by clicking the button labeled Attachments. Please describe in detail which fields and buttons are having problems, and the detail of the problems. I will review your design for you. Our help guide describes how to export your form design: /Documentation/manual/html/?d_exportingformsandformdata.htm.