Update, from a Twitter spokesperson:
“Password resets are a standard operating procedure if we see anything even close to fishy related to an account in an effort to keep people safe”.
There have been a number of cases where phishers have targeted user accounts via DM sending them to a spoof login page that grabs passwords and then uses your account to propagate the phishing messages to more users.
This message is getting out pretty quick, however, due to a Tweet from Jason Pollock:
The notice from Twitter, as seen below, appears to be heading off the phishing attack before it becomes too widespread:
We may sound like a broken record on this, but TNW is urging you to please use an up-to-date browser that has integrated anti-phishing and anti-malware protection. In the mean time, we’ve contacted Twitter, and we’ll fill you in with any information that we find.