31.   About the best they can do is to add new viruses to their signature database as customers report problems.

32.   After that incident, members of a committee at the National Institutes of Health found that scientists were not routinely reporting problems with gene therapy experiments.

33.   Airline personnel were checking to see if any pilots had reported problems with the anti-icing gear on that plane.

34.   But few problems were reported.

35.   But it is impossible to know how much of that is due to differences in reporting the problem, rather than in the extent of the problem itself.

36.   But it said operators piled mistake on mistake, and should have reported the problem to the Nuclear Regulatory Commission within four hours.

37.   But many people report continuing problems, like slow and fuzzy thinking, Alexander said.

38.   But law enforcement agencies and Internet service providers encourage civic-minded netizens to report the problem.

39.   But New Jersey Transit reported several problems on its rail lines.

40.   But the company did not report the problem or recall existing products, he said.