[FPSPACE] double booking at Russian ISS docking port?

[Chris Jones]

http://space.com/news/spacestation/iss_docking_000731.html has a story about
the apparent double booking of Zarya's nadir docking port, Boeing/Khrunichev on
one hand and SpaceHab/Energia on the other.  S/E claims to have a signed
contract for use of the port, but it sounds like if B/K is ready to go first,
that might render the contract moot.  (The arrival of the Universal Docking
Module several years from now could mean enough ports for everyone.)