For the past 5-7 weeks, I've had a user login/password issues. Today, I discovered that if I disable my Kontera ads, that all login/password issues go away.
Seems as if Kontera, on my site at least, is the culprit and NOT vB at this point. I'm running 3.8.5 also
I've emailed my Kontera rep, let's see what he says.