A fresh workstation install leaves netscape-communicator that has a bus error when running Java applets. This does not happen with an upgrade from 5.2. Adding compatability libraries seems to fix it. The dependencies for the netscape-common rpm should be fixed.
run 'chkfontpath --add /usr/X11R6/lib/X11/fonts/75dpi', and restart the font server. This should fix the problem.
*** This bug has been marked as a duplicate of 2711 ***