I've had segfault problems with cmucl-2003-12 on Fedora and I concluded it was related to shared library mappings. I ended up moving DYNAMIC_0_SPACE_START to 0x50000000, which in principle requires a cross compile from a working platform. I've made a dist available at <http://home.cern.ch/mrohne/cmucl-2003-12-x86-linux.tar.gz>, use at your own risk as I am not a qualified cmucl builder(tm).
Ole
