Don't know. This article suggests that, but I'd treat that as hearsay for the moment, until and unless the company gets clearer about what's going on.

Anecdotally, it looks like a pretty hefty chunk of the password file got stolen: discussions I've seen in the tech community seem to be evenly split between people who found their (relatively secure) passwords in the posted file and those who didn't.

But the article is a good reminder to be cautious -- the scam described there sounds relatively innocuous, but it does serve as a reminder that more-serious phishing scams are pretty much certain under the circumstances...