This post in the forum thread may be on to something: "I also have a unique dropbox email address, it was compromised on 2/6, but I tracked it down to a friend

This post in the forum thread may be on to something: "I also have a unique dropbox email address, it was compromised on 2/6, but I tracked it down to a friends system that was hacked. I had shared a dropbox folder with them, they got the email from my dropbox address. Virus on their system collected my dropbox email from their system."