Two post-migration issues:
Login for legacy LW1 users now seems to be totally broken: a user error “LW1 user detected, legacy salt attached” shows up in the JS console (and appears immediately on GreaterWrong) but nothing further happens.
The third party site GreaterWrong doesn’t seem to be showing updated karma scores or recent (newly-imported) LW1 comments in its user profiles, although these do appear on LesserWrong.
Two post-migration issues, discussed here.