"At least a half-dozen homebuilders, installers and environmental consultants knew as early as 2006 that foul smells were coming from drywall imported from China – but they didn’t share their early concerns with the public, even when homeowners began complaining about the drywall in 2008.
ProPublica and the Sarasota Herald-Tribune reported last month that two U.S. companies – WCI Communities, a major Florida homebuilder, and Banner Supply, a Miami-based distributor – knew about the problem in 2006. But according to recently released sworn depositions by current and former executives at Banner, other companies also were aware of the problem."
Source: ProPublica, 06/21/2010