% python -c 'import louis; print louis.hyphenate(["en-us-g1.utb", "hyph_en_US.dic"], u"straightforward")' zsh: segmentation fault python -c It happens with both 2.4.1 and current svn version. It crashes only in Python, it seems to work well in C. It crashes only on certain words. For a description of the software, to download it and links to project pages go to http://www.abilitiessoft.com