Ask HN: Has Dropbox been compromised recently?

I just received an alert from a (paid) Internet surveillance service, stating:

Site WWW.DROPBOX.COM

"Your email address has been found compromised online. We monitor online properties to identify the illegal trading and selling of your personal information, and unfortunately we have found a match that may indicate possible identity theft."

I closed Dropbox a while ago, and the pwd was a randomly generated one. False positive or a hack surfacing just now? Anyone noticed suspicious activity related to their Dropbox account ?