I just looked at http://helpx.adobe.com/captivate/kb/top-issues-captivate-7.html which is a list of top issues with Captivate 7, and this issue is not listed.
I hope that this information will be helpful to others and save them from spending days on end, as I did (as a contractor, without pay for troubleshooting Adobe bugs), trying to troubleshoot a problem for which there is no solution.