After switching my home machine to FreeBSD 5.3, I have found that pyblosxom just does not like FreeBSD. Or the version of pythons is broken, or something else that causes the process to leak memory like crazy. It did the same thing on my hosting account. So I have switched to blosxom, which after a little work does the same job. There might be a few rough corners for a few days, but mostly everything should be about the same as before.