The debate over a national ergonomics standard continues. The Bush administration is currently reviewing the new ergonomics rules, and at least 31 lawsuits have been filed challenging them. Plus, the question of whether there is scientific support for the standard is still open. A long-awaited study by the National Academy of Sciences concluded that some jobs can be associated with musculoskeletal injuries, but that the work-injury relationship is complicated. California is expected to issue revised rules to comply with federal ergonomics requirements within the next few months.