The vast majority of accessibility errors detected by the automated function of Bobby in the 2002 study fall into two categories: images without alternative text and image-map hotspots without alternative text. Errors in the former category occur most frequently (close to 83% in the combined set of SLIS and library web pages). About each sixth error detected by Bobby (about 16%) in the combined set falls into the latter category. Libraries have, on the average, a somewhat higher proportion (22%) of image map hotspots with missing alternative text. Similar percentages, with a slightly higher proportion of errors pertaining to missing alternative text for image map hotspots (21% in the combined set), were revealed by the 2000 data. Missing frame titles constituted 1% of the errors in 2000, as compared to .16% in 2002. It is this author’s impression that this decline has less to do with more accessible frame arrangements than with a general decline in the use of frames.