31.   Modern military operations have become so complicated that a chronic problem is keeping units on the same side from doing harm to each other.

32.   Production problems will keep Advanced Micro from cashing in on the PC boomlet in the third quarter, though.

33.   Physical problems have kept the Rangers from getting full value from Gonzalez to this point in his contract.

34.   Rights problems also keep many old titles out of circulation.

35.   Shuttle wiring problems kept the fleet grounded, and ultimately led to the delay of Discovery launch to fix the Hubble telescope.

36.   Sometimes health problems keep an up-and-coming executive from moving into the top spot.

37.   The economics problem would be keeping Evander or Michael happy.

38.   The latter problem kept him in a prolonged dodge from scandals.

39.   The problem has been keeping five starters healthy and productive.

40.   The problem has kept some Fidelity customers from profiting on a surge this year in initial stock sales.