11.   A default would be a big headache for automakers.

12.   ADA suits and their complicated interactions with other employment laws, like workers compensation, have become a big headache, many businesses say.

13.   But opposition to replacements is proving to be a big headache, particularly since it is coming from several sources.

14.   But senior officials have no appetite for another confrontation with China, especially in an election year in which Sino-American relations have already been a big headache.

15.   But the Cowboys also had a big headache.

16.   But until large-size apparel came along, brawn also meant big headaches.

17.   Caches of nuclear material spread throughout the former Soviet Union remain a big headache, though headway has been made in assuring their security.

18.   Counterfeiting of consumer goods remains a big headache, too.

19.   Done the wrong way, year-end securities trades can result in big headaches and bigger tax bills.

20.   Falcons center Robbie Tobeck could end up with a big headache Sunday.