CFBundleIdentifier & Application Version

Reading things like,http://developer.apple.com/qa/qa2004/qa1373.htmlwhich discuss CFBundleIdentifier, the example always given for what it  should look like is of the form:  com.mycompany.MyAppMy question is, as different versions, of the same application, are  released, it is a good idea or recommended that the CFBundleIdentifier  reflect the version of the application as well. For example, one might  have:com.mycompany.MyApp2007com.mycompany.MyApp2008com.mycompany.MyApp2009If it is not a good idea or not recommended, why?The tech note above does say:Note: Most Xcode templates give a generic default value for  CFBundleIdentifier to try to avoid as many problems as possible. It is  still important to set your own unique value, however, as applications  with identical CFBundleIdentifier values will override each other.While it is obviously important that two different applications (say a  word processor and a game) have unique identifiers, it isn’t clear to  me that diffe...