Many thanks only1gail! The broker wrote this to me. This comes from the camp place of the banks. Whether is this right?
Regarding the PEARL ASIAN, according to Bloomberg you are correct that it shows the ex date as 26/02/07 however it states that the stock will not be quoted as "EX" by the exchange.
According to all of the information that I have received from ML the correct ex date is the 22/02/07. ML base all of their information on DTC and not Bloomberg.