AMD64 JVM crashing.

I am using the 1.4.2-rc1 build for AMD64 on Fedora Core 2, kernel 2.6.7 
(this occurs with all recent errata releases of the 2.6.7 kernel for FC2).

Trying out various bits of java code, I can reliably crash the entire JVM 
with a segmentation fault in a couple of ways:

A) Running eclipse, and trying to set up a new project using the extssh2 
plugin to check out some Java code from sourceforge, eventually the JVM 
crashes at some point with a segfault.

B) A more reliable way to segfault the JVM is by running Mozilla, going to 
http://games.yahoo.com, and trying to run the "Tip Top" applet.  The JVM 
crashes every time.  Other applets work fine -- I can run the "Dynomite" 
applet without crashing, for example.  Its performance on blackdown's AMD64 
JVM seems rather jerky to me, compared to Sun's i586 jvm running on a 
comparatively slower i686 box.  But the AMD64 box has a slow video card, so 
that may be it.

Can anyone else run that Tip Top applet on AMD64, without crashing?

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)

iD8DBQBBEuTox9p3GYHlUOIRAkzeAJ4wYqWG4lQLNE0r7hDhDmeQHDlP7gCfV9fC
sCPjesajtT6E67ld58MlPIM=
=TwAw
-----END PGP SIGNATURE-----