Most of the drywall complaints come from Florida, but the defective drywall made its way to many other homes throughout the US.
IF YOU HAVE THE STUFF, GET RID OF IT!
The defective drywall from China emits sulfide fumes. Homeowners have complained of the stink of rotten eggs, corrosion of appliances, and health problems such as bloody noses, headaches, and respiratory issues.
See this Wall Street Journal article from 4/3/2010 for more details.