An interesting problem. I have the latest version of flash on a Win 7 Ultimate 64 bit computer that will not show Flash when using HTTP, but will through HTTPS. All firewalls are off, and the same results when using 32 bit IE or Firefox. Even tried "Square". Other computers on the same network work fine. It does have a Nvida GeForce 9500 GT video but when removed and run through the on-board port had the same problem. Any ideas?