1.   But intermittent problems have persisted, and Ms. Whitman has not hesitated to tap powerful Silicon Valley connections to help her.

2.   Customers have had intermittent problems since Monday, Wilson said.

3.   Day said the Federal Aviation Administration noticed the intermittent problem three weeks ago.

4.   Some intermittent problems first cropped up Wednesday on eBay, after the company reorganized its Web site to make it easier to use.

5.   Sometimes the heat inside the computer can cause metal to expand and a poorly seated card can get loose enough to cause intermittent problems.

6.   Two babies have been hospitalized for intermittent problems since June.