Had the same problem with a fresh installation of MyEclipse 6.5 (Pulse Install) not loading past the Splash Screen. Always gave the following:
#
# An unexpected error has been detected by HotSpot Virtual Machine:
#
# SIGSEGV (0xb) at pc=0x02cb278c, pid=31756, tid=4159826128
#
# Java VM: Java HotSpot(TM) Server VM (1.5.0_11-b03 mixed mode)
# Problematic frame:
# C [libxul.so+0xcb278c]
#
# An error report file with more information is saved as hs_err_pid31756.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
#
After fighting this for hours trying different JDKs, versions of Eclipse, versions of MyEclipse, I finally ran across this posting. The renaming of the xulrunner-1.9 directory does the trick! However, upon renaming it back, MyEclipse will no longer start. Our shop only uses MyEclipse and I am trying to get a new computer ready for Monday with all the latest and greatest software/hardware, but it does not look good. Looks like I am going to have to install old software on a new computer to get it to work. I have seen that this bug has been around for a while. Whose bug is it, and why haven’t any decent workarounds been given since it does not appear that anyone is rushing to get this fix?