Comment 26 for bug 513887

When the dom.ipc.plugins is enabled i get an freeze with plugins, but a different error:
/usr/lib/xulrunner-1.9.3a4pre/mozilla-runtime: error while loading shared libraries: libxpcom.so: cannot open shared object file: No such file or directory

looks like a linking/library path problem with mozilla-runtime

If I do the quick hack of making symlinks of the required libraries in the /usr/lib then it works.