I'm having a similar problem to the previous Segmentation fault post but the fix in it didnt help. I tried the ulimit -s thing but that didnt work. Here is the error message:
/home/user/runLimeWire: line1:3092 Segmentation fault "/usr/java/jdk1.3.1_03/jre/bin/java" -Xmx100000000 -Xms20000000 com.zerog.lax.LAX "/home/user/LimeWire/LimeWire.lax" "/tmp/env.properties.3020"

Any Ideas?