Tested with MC 6 and @ES# (time zone: local) from iqfeed.
My local time is GMT +1.
till 30.10.2009 MC 6 plots chart with corrrect session begin/end time it is:
from 15:30 to 22:15
but from 30.10.2009 (tested till 01.03.2009) MC 6 plots data from
14:30 to 21:15 !!!
ciao
radekj