I have seen that when a new Ubuntu version is released, sometimes a particular application that I had used till the previous Ubuntu versions would have been removed from the Ubuntu repositories for the latest release.
Who can makes such decisions( a particular Launchpad team/individual,etc..), and which mailing-list(or other resource) should I look to find the exact reason for removal of the package from the latest Ubuntu release.
e.g: Kompozer has been removed from the repository for Quantal