The other day I noticed an Opera icon on my dock, clicked and not surprisingly, Opera appeared. I have never installed Opera and Im the only one who has ever touched my macbook. I quit out of it, and it disappeared off my dock, which means not only had it installed itself but run all by itself too. So I went straight to my apps folder to find and delete it and it wasn't there. A spotlight search came up with nothing too?? How is this even possible with the permission system of OS X? Any ideas on how to find out if/where it is installed? Does anyone know of any applications it might have come bundled with? I really don't like the thought of apps being able to install and run themselves.