When I run Mosaic 2.7b5 in the Afterstep window manager all the anchor
text (hypertext) links are white, making it difficult to use when a web
page has a white background.
Evidently when you use a 256-color display and have the Wharf running
with colorful icons Afterstep runs out of colors to assign.
You can either shut down the Wharf, use less colorful icons, or run in
24-bit (millions of colors). Mosaic doesn't work on 16-bit displays,
as far as I know.