About 13,000 U.S. employers received letters recently alerting them that their company's injury and illness rates run "significantly higher" than national averages and warning them to shape up. The letters don't mean an automatic inspection, but they do increase the chances. If you didn't receive such a letter, don't slack off on safety. All it takes is one employee complaint or major accident to trigger an OSHA inspection. Note: Employers receiving the letters reported seven or more injuries or illnesses that resulted in lost workdays for every 100 full-time workers. The national average is 2.8. For a complete list of the 13,000 employers, by state, visit www.osha.gov/as/opa/foia/hot_10.html.