Things That Cannot Change by Dianne Hackborn

Sometimes a developer will make a change to an application that has surprising results when installed as an update to a previous version — shortcuts break, widgets disappear, or it can’t even be installed at all. There are certain parts of an application that are immutable once you publish it, and you can avoid surprises by understanding them.


For more information read Dianne Hacborn's article at:
http://android-developers.blogspot.com/index.html