I get something that's bit-for-bit the same as what's in unaccent.rules. So there's clearly a platform difference between here and there.
I'm using Python 2.6.6, which is what ships with RHEL6; have not tried it on anything newer.
Well, that's embarrassing. When I looked I couldn't see anything that looked platform specific. I'm on Python 2.7.6, which shipped with Mint 17. We use other versions of 2.7 on our production platforms. I'll take another look, and check the URLs I am using.