On Friday, the day of the transition from analog to digital television, Nielsen reported that some 2.5 million people were still "completely unprepared" for the switchover. But, to read Nielsen's ratings for the network evening newscasts for that day, one might have concluded that all of them regularly watched ABC World News With Charles Gibson . The ratings indicated that the ABC newscast drew just 4.09 million viewers, the worst in the network's modern history. ABC protested, demanding in effect, a recount, and on Wednesday Nielsen issued revised data which pushed up the number of viewers to 6.34 million. Nielsen blamed unspecified problems related to the transition.