Hi there,
Can you please confirm complete Captivate version? (help > about Adobe Captivate)
and also the Operating system?
Is it an issue on I-pads only or on desktop (locally) as well?
Have you tried to view the output in different browsers?
Please review this link for best practices to publish in HTML 5 output: http://helpx.adobe.com/captivate/using/publish-projects-html5-files.ht ml
Thanks.