This is rather strange and disturbing a Ubuntu package in Debian. Since I do not choose to run *buntu but Debian Sid, I feel the maintainers should rename the package. What's next the *buntu desktop package?
Package update-manager
* testing (gnome): GNOME application that manages software updates
0.42.2ubuntu22-5: all
* unstable (gnome): GNOME application that manages apt updates
0.42.2ubuntu22-7: all
0.41.1.dfsg+CVS20051105-2: kfreebsd-i386