gentoo 1.3b, stage 3 install, kernel 2.4.18 (xfs) # emerge blackdown-jre # env-update # emerge mozilla # env-update error: LoadPlugin: failed to initialize shared library /opt/blackdown-jre-1.3.1/plugin/i386/mozilla/javaplugin_oji.so [/opt/blackdown-jre-1.3.1/plugin/i386/mozilla/javaplugin_oji.so: undefined symbol: __vt_17nsGetServiceByCID] mozilla works fine, but i'd really like to use the plugin!
None of the java folks have released a version of their java software which is designed to be compatible with GCC-3 Mozilla, you will therefore find that none of the precompiled binary plugins for java will work with GCC-3 Mozilla. This is not something that we here at Gentoo Linux can address, please take it up with the distributors of the Java JDK/JRE packages.