[NiLuJe]

If you change FW version, any or all of the settings might actually be expecting a different format, and FW do NOT have sane downgrade paths for those (hell, the upgrade paths are sometimes iffy, too).

Which is why we recommend *wiping* /var/local when downgrading.

On the other hand, if you don't touch /var/local, you don't have to restore it, either.

None of those settings are critical if you're using a real account (f.g., a factory reset wipes /var/local, among other things).

Note that we *do* use /var/local for JB restoration purposes, so, if you do wipe it, you'll have to be careful in which order you do things if you don't have a sane diags as a rescue...