mozilla lacks an rpath, hence when run standalone rather than from its shell script, cannot find libmozjs.so.... which means it doesn't get prelinked. Running 'LD_LIBRARY_PATH=/usr/lib/mozilla-1.4 prelink' works around the problem. Adding an rpath would allow mozilla to get prelinked from the nightly cron job.
slightly more info in another bug. duping. *** This bug has been marked as a duplicate of 106837 ***