>Maybe newer GCC versions are causing trouble? the 9vx that doesn't work for me is one that was compiled over a year ago and has run happily on several Ubuntu and other Linux versions until Ubuntu 10.04LTS. although i realise that thanks to shared libraries, compiler variations could still play a part, i'm still more inclined to suspect either a system-level change, a difference of system configuration (eg, for shared libraries), or a change to one of the supporting libraries, and there are a few to choose from: linux-gate.so.1 => (0xb788d000) libX11.so.6 => /usr/lib/libX11.so.6 (0xb7785000) libpthread.so.0 => /lib/tls/i686/cmov/libpthread.so.0 (0xb776c000) libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7608000) libxcb.so.1 => /usr/lib/libxcb.so.1 (0xb75ee000) libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0xb75ea000) /lib/ld-linux.so.2 (0xb788e000) libXau.so.6 => /usr/lib/libXau.so.6 (0xb75e6000) libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0xb75e1000)
9vx also makes inventive use of mmap and sigsegv.