By reporting to your boss that one co-worker called African-Americans "black monkeys" and "black apes," are you opposing discrimination in the workplace? (An employer cannot retaliate against an employee for opposing workplace discrimination.) Two Fourth Circuit judges (out of a three judge panel) had ruled that reporting a single racist comment is not sufficient opposition to be entitled to Title VII's anti-retaliation provision. See here, here, and here.
Now, by a vote of 5 to 5, the full Fourth Circuit denied en banc review of Jordan v. Alternative Resources Corp. En banc review (that is: review by all of the judges on the court) requires a majority vote. As a result, employers in Maryland are free to fire employees who complain that a co-worker made a racially derogatory remark.
I imagine this case is headed to the United States Supreme Court.