Just saw this news item:

The largest U.S. microwave popcorn maker, ConAgra Foods Inc., said Wednesday it will change the recipe for its Orville Redenbacher and Act II brands over the next year to remove a flavoring chemical linked to a lung ailment in popcorn plant workers.

The announcement comes a day after a doctor at a leading lung research hospital said in a warning letter to federal regulators that consumers, not just factory workers, may be in danger from fumes from buttery flavoring in microwave popcorn.

But it smells so good!