EXCLUSIVE: Bob Bibb and Lew Goldstein are departing Lifetime Networks where they had been co-chief marketing officers since August 2007. I hear the two resigned but I also hear their contracts were up and weren’t going to be renewed. The announcement was made internally this afternoon. Lifetime’s marketing team will report directly to new president/general manager Nancy Dubuc while she is looking for a replacement. Dubuc is currently in Los Angeles. She has been a frequent presence at Lifetime’s headquarters here since taking the reins of the network as she juggles her new responsibilities at Lifetime and her existing ones at History. Veteran marketing executives Bibb and Goldstein were hired at Lifetime by previous president/CEO Andrea Wong, with then-entertainment president Susanne Daniels playing a key role as she had worked with the duo at the WB. Bibb and Goldstein were involved in the launch of two broadcast networks, Fox and then the WB. Lifetime is coming off a rough past few years, struggling with its brand identity and tumbling some 20% in the ratings.