Sorry my first post is a complaint about the same issue. When I click on the game link on my facebag page I get the attached screen shot. Game worked fine yesterday. Tried dumping the plug-in from the library folder manually, and removing the app, no luck. Running it on Chrome on MacOS 10.6
I should probably add which game, lol. Dead Trigger 2, but all games that use the Unity engine are now broken for me on facebook, using both Chrome and Safari. Safari makes it to the splash page before it bogs out.
This is really odd as web player still works in Safari and Firefox, which are 64 bits binaries too (as displayed in OSX activity monitor).
Any details about that ?