there's an elephant in the room...
and it is using older versions of Captivate with Flash 10.1 (or higher).
Please correct me if I'm wrong, but if you publish SWFs with Captivate 4 or older versions, and these SWFs are played usiing Flash Player 10.1 or higher, you will experience intermittend playback issues. They may manifest themselves as missing audio, distorted animation, non-functioning scrub bar, etc.
Adobe has no solution to this from what I've reserached; the workaround is downgrading to an "archived" version of Flash i.e. versions prior to 10.1, or (surprise) to upgrade to Captivate 5. We have over 400 lessons viewed by potentially 70,000+ users who were required to upgrade to 10.1 due to security issues with older versions. We are now experiencing these playback issues, and we cannot ask them to downgrade. Instead we ask them to re-launch the lessons and / or refresh the browser until the issue goes away.
So, if you're environment fits the above description, these issues occur. Again, I would love to be corrected on this. It's possible it also has something to do with the action scripts used, but I have not seen this referred to in the support documentation I've seen from Adobe on this subject.
Message was edited by: sjcecran