In Snow Leopard, when I install an app from the App Store it automatically places it on the Dock with the "Keep in Dock" option enabled.
Due to my poor mouse skills I've made the Dock immutable, so when I install an app from the store I cannot remove it! I have to unlock it, remove the app and relock it again.
It has happened enough times by now that it is starting to get on my nerves.
Any way to stop the Dock from automatically keeping new items or stop the App Store from putting them there?