I think you are running 10.10, and the behaviour is different in 11.04. There will be no (x) over the icon when you drag it away from the launcher, the only way to remove it by dragging is to drop it on the trash.
Mark -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/713496 Title: Application Icon rendering artifacts -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs