The Ninth Circuit Court of Appeals has affirmed a district court order excluding the expert testimony proffered by a plaintiff alleging that his residential exposure to the butter-flavoring chemical diacetyl in microwave popcorn caused his bronchiolitis obliterans, a debilitating lung disease. Newkirk v. ConAgra Foods, Inc., No. 08-00273 (9th Cir., June 17, 2011) (unpublished). The Ninth Circuit determined that the lower court did not abuse its discretion in excluding the testimony and that, without evidence of specific or general causation, the lower court properly granted the defendants’ motion for summary judgment. Additional information about the case, filed by a man who purportedly consumed four to six bags of microwave popcorn daily, appears in Issue 274, Issue 356 and Issue 360 of this Update.