The problem is not Netscape, but Java. I had the same problem with
Opera, it has to do with libXt being loaded before java does. If you
can get Netscape to load Java before libXt, it should take care of the
problem, at least it did for Opera. I added these lines to the Opera
shell script:
LD_PRELOAD="${OPERA_JAVA_DIR}/libawt.so"
OPERA_FORCE_JAVA_ENABLED="1"
export LD_PRELOAD OPERA_FORCE_JAVA_ENABLED
Hope this helps you