Αν χρησιμοποιείτε Dropbox, θα πρέπει να αλλάξετε τον κωδικό πρόσβασής σας σύμφωνα με ένα e-mail που απέστειλε η company to some of its users.
The email reports little information about the reasons that led the company to alert its users, and it seems to be a reaction to a security incident that took place in the middle of 2012.
We are in contact with you to inform you that if you have not updated your Dropbox password from within 2012, you will be prompted to update it the next time you sign in. This is purely a precautionary measure, and we apologize for the inconvenience.
To learn more about why we take these precautions, please visit the Help Center page. If you have any questions, don't hesitate to contact us at Password-reset-help@dropbox.com.
The email sent by Dropbox contains a link to a FAQ Help page that answers some of the questions.
Apparently Dropbox discovered a leak that included a list of Dropbox account names (usually an email address post officey), and salted passwords.
So all Dropbox users will not receive an email for password change, only email addresses that the company believes are leaked.
Of course it would be good if you use the service to change your password, come do not come email from the company.