Perhaps this is a known issue. I was running the netscape-common|navigator 4.51 packages, and upgraded to 4.6, from the updates RPMs (obtained from metalab.unc.edu/pub/Linux/distributions/redhat/updates). Any page that starts Java causes the browser to die. It gives a "Bus error". Sounds like the problems we used to have that necessitated doing LD_PRELOAD stuff, no?
*** This bug has been marked as a duplicate of 2386 ***