Facebook isn't showing any signs of a virus. What people are experiencing is due to a bug in either the Facebook servers or Facebook App. This problem was apparently introduced in the recent upgrade to the Facebook servers.
I disagree , as I havea Trojan horse on my iPad 2 and my iPhone 4S. I got rid of it on my PC but seeing that my IPad and phone are not supposed to get them, and now have them, how do I get rid of them on the 2 devices?