I'm puzzled about the segfault. I'm pretty sure that I've compiled and tested the code on big endian machines as well as a SPARC machines that doesn't allow unaligned memory access. The FNV code copies the blocks to an aligned buffer to prevent exactly this bug. Serhiy spent days to optimize the code as humanly possible.

Please recompile Python again. This time create a debug build (--with-pydebug) and use the default hash function FNV for your platform. The debug build helps to pin point the bug.