Here is another batch of Hacked Dropbox accounts from the massive hack of 7,000,000 accounts
To see plenty more, just search on [redacted] for the term Dropbox hack.
More to come, keep showing your support
things started to get a little serious as hackers claim that the remaining 6.9 million passwords and accounts will be violated if their demands are not set , Dropbox later issued a new password setup process for 400 accounts that was exposed at first , other users are now recomended to set up the two step verification process and not to use common or easy to hack passwords .
Via DropBox -
The usernames and passwords...were stolen from unrelated services, not Dropbox. Attackers then used these stolen credentials to try to log in to sites across the internet, including Dropbox. We have measures in place that detect suspicious login activity and we automatically reset passwords when it happens.
Source - CNET