Situation froma Yahoo poster:
No source of this information provided, but it's logical:
"DTC has a global lock down on the shares of CCME because there is at this time no registered transfer agent responsible for the counts, legitimacy, registration, etc. of the shares in the U.S. This could mean many things in the real world, but basically at this point no one can deliver share to anyone else, so all the trading you are seeing is occurring within brokerage houses and not between different houses."