I have had a similar problem over HTTPS with flash player 8/9. After browsing the adobe forums the problem seam's to be, and i quote here ............
There is a Flash-Player-and-Firefox issue with putting ":443" in the url. For standard http port 80 and https port 443, when Firefox returns policy files to the player, unfortunately Firefox strips off the port from the url, which causes Flash Player to think that the incorrect policy file was returned (as the returned url does not exactly match what Flash Player wanted), so the file upload will not be permitted. -- Firefox crashes with upload to a flash site https://launchpad.net/bugs/85833 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
