Trouble seems to be afoot at Australia's biggest retailer, Coles Myer, where it is believed leaks about the company's weakening performance are undermining management. Leaks of Coles' deteriorating performance earlier this year were understood to have been aimed at undermining CEO Dennis Eck. Now the latest revelations of weaker trading in the group's three apparel and general merchandise divisions are believed to be aimed at chief operating officer, Warren Flick.