I tried renaming the binary xulrunner-bin to xulrunner.
And ran the test, Eclipse still crashes with the same message:
ENTRY org.jboss.tools.vpe.xulrunner 1 0 2010-10-23 23:59:46.747
!MESSAGE earlyStartup: XULRunner path is: /Applications/Eclipse_3.6.1/XUL_1.9.1.2
2010-10-23 23:59:46.913 eclipse[170:10b] [Java CocoaComponent compatibility mode]: Enabled
2010-10-23 23:59:46.914 eclipse[170:10b] [Java CocoaComponent compatibility mode]: Setting timeout for SWT to 0.100000
Illegal instruction
Disgaea:Eclipse_3.6.1 luis$
ENTRY org.jboss.tools.vpe.xulrunner 1 0 2010-10-23 23:59:46.747
!MESSAGE earlyStartup: XULRunner path is: /Applications/Eclipse_3.6.1/XUL_1.9.1.2
2010-10-23 23:59:46.913 eclipse[170:10b] [Java CocoaComponent compatibility mode]: Enabled
2010-10-23 23:59:46.914 eclipse[170:10b] [Java CocoaComponent compatibility mode]: Setting timeout for SWT to 0.100000
Illegal instruction
Disgaea:Eclipse_3.6.1 luis$