What is curious is that it works properly for HTTP, so at a basic level all the things that are necessary to make anything work seem to be in place. I don’t believe now that crossdomain.xml is an issue because 1) it worked fine without one with HTTP and 2) from tailing policyfiles.txt, calls are never made to the xml file in either scenario. The wrapper html file allows networking.
The error received is SecurityError: Error #2000: No active security context.
Given that it works in HTTP, should this be as simple as adding the following:
receiverLC.allowInsecureDomain(“localhost”);
where receiverLC is the localConnection object in the swf, to make this work for HTTPS?