I have been using ljmigrate to periodically backup my journal, for years. But it seems like at some point, LJ changed something about how you access comments, such that the tool stopped finding them. (And it's long since been abandoned by its creator.) I didn't realize until today, because it's not throwing errors, but the last entry in the archive that has comments on it is from 8/14/12. The next time I backed up, none of the new entries got their comments attached. :-/
Anybody know a tool for this that's up-to-date? Or know enough about LJ's architecture to easily write a patch for ljmigrate.py?