Beginning with util-linux 2.20 a new version of mountpoint is installed (in /bin).
This conflicts with the existing binary from sysvinit (in /usr/bin).
The accepted way is to maintain it now together with mount in util-linux.
Here is the original discussion which also includes a first draft version of a patch:
FYI: The development tree of sysvinit no more installs mountpoint by default.
Very nice if we could clean this up before 14.1!