Ok, maybe some one here can be more useful then Adobe tech support. I tried to update to 12.0.4 and it failed .Tried it several time.After trying with the help of the tech support ,for one hour or so(it took less time to kill Bin Laden), I get advised to do e clean installation of CS5. After clean installation I get a CS5.1 with a 12.1 software version. The tech doesn't know what it is and of course I don't. At some point the tech got disconnected so I am left here to ponder.Does any one know what the 12.1 version is ?