I thought it was LoudTwitter, but LoudTwitter disagreed.
Turns out it was LiveJournal itself.
Some new upgrade that I wasn't aware of, but agreed to. So I revoked the access via Twitter before I figured this out. But it messed something up. So I tried to reapply the access, but the LiveJournal said no.
It took 3 days to get things settled.
For two internet social networks that I don't even use anymore.