Air URLLoader Error #2032 only with SSL w/redirects on windows

We have several commercial air apps deployed. About 3-4 times a month, we get a user whose app cannot connect to our web server to get some info the app uses.

This is a very odd problem: we use URLLoader to fetch the info from the server. For most people there is no problem, but only for some with a windows PC, they get the error #2032 if the url is ssl and the remote server sends a redirect http response.

We have had problems in the past with air and error #2032 with SSL connections, and it is usually a problem with windows computers time being off by over 24 hours but in this case the time is set correct.

When this problem happens, the following is true(again, using URLLoader):

1. SSL urls work fine if there is no redirect from the server. But if the server redirects, the app gets the #2032 error.

2. This only happens on a windows computer, and only for some users.

This problem seems to be isolated to Air apps:

3. On computers with the problem, the same ssl url with the redirect works fine in internet explorer, chrome, ff.

4. We created a seperate, very simple air test app, and a duplicate c# app in visual studio. When testing on computers with the problem, accessing the ssl url with the server redirect, the test air app fails to connect with error #2032(just like our deployed app does), but the visual studio app connects just fine just like the browsers.

I have spent a lot of time remotely accessing a few of our customers computers that had this problem- tried disabling windows firewall,  any 3rd party firewalls, virus protection software, rebooting - and have never been able to resolve it. I cant see any other security software on the computer, but it sure seems related to something that is interfering only with Air.

Thanks for any ideas.

Bob.